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INTERNATIONAL THEOLOGICAL COMMISSION

Jesus Christ, Son of God, Saviour

1700th anniversary of the Ecumenical Council of Nicaea
325-2025

 

Index

Preliminary note

Introduction: Doxology, theology and proclamation

Chapter 1: The Symbol for salvation: doxology and theology of the Nicene dogma 

1. Grasping the immensity of the three divine Persons who save us: ‘God is Love’ – infinitely

1.1 The greatness of the fatherhood of God the Father, foundation of the greatness of the Son and the Spirit
1.2 A reflection on recourse to the expression homoousios
1.3 The unity of the history of salvation

2. Grasping the immensity of Christ the Saviour and his saving act

2.1 Seeing Christ in all his greatness
2.2 The immensity of the act of salvation: its historical density
2.3 The greatness of the act of salvation: the paschal mystery

3. Grasping the immensity of the salvation offered to human beings and the immensity of our human vocation

3.1 The greatness of salvation: entering into the life of God
3.2 The immensity of the human vocation to divine Love
3.3 The beauty of the gift of the Church and of baptism

4. Celebrating the immensity of salvation together: the ecumenical significance of the faith of Nicaea and hope for a common date for the celebration of Easter

Chapter 2: The Symbol of Nicaea in the life of believers: ‘We believe as we baptise and we pray as we believe.’

Introduction: Living out the faith we confess

1. Baptism and Trinitarian faith

2. The Symbol of Nicaea as a confession of faith

3. Going deeper in preaching and catechesis

4. Prayer to the Son and doxologies

5. Theology in hymns

Chapter 3: Nicaea as a theological and ecclesial event

1. The Christ event: ‘No one has ever seen God. The one-begotten Son has revealed him’ (Jn 1:18)

1.1 Christ, the Incarnate Word, reveals the Father
1.2 ‘We have the mind (νοῦς) of Christ’ (1 Cor 2:16): analogy of creation and analogy of charity
1.3 Entering into knowledge of the Father through the prayer of Christ

2. The event of Wisdom: a new reality for human thought

2.1 Revelation enriches and expands human thought
2.2 A cultural and intercultural event
2.3 The Church’s creative fidelity and the problem of heresy

3. The ecclesial event: the Council of Nicaea, the first ecumenical council

3.1 The Church enters into the event of Jesus Christ through her nature and structures
3.2 The structural collaboration of the Church's charisms and the road to Nicaea
3.3 The Ecumenical Council of Nicaea

Chapter 4: Keeping the faith accessible for all God's people

Introduction: The Council of Nicaea and the conditions of credibility of the Christian mystery

1. Theology at the service of the integral character of salvific truth

1.1 Christ, the eschatologically effective truth
1.2 Salvation and the process of divine filiation

2. The mediation of the Church and the inversion of the dogmatic order: Trinity, Christology, Pneumatology, Ecclesiology

2.1 The mediations of faith and the ministry of the Church
2.2 Disagreement and synodality
2.3 The tongues of the Holy Spirit for forming and renewing consensus

3. Safeguarding the deposit of faith: charity at the service of the littlest

3.1 The unanimous faith of the People of God offered to all
3.2 Protecting faith before political power

Conclusion: Proclaiming Jesus our Salvation to everyone today



Jesus Christ, Son of God, Saviour

1700th anniversary of the Ecumenical Council of
325-2025

Preliminary note

In the course of its tenth quinquennium, the International Theological Commission chose to carry out an in-depth study of the First Ecumenical Council of Nicaea and its dogmatic relevance today. The work was carried out by a special Sub-Commission, chaired by Fr. Philippe Vallin and composed of the following members: Mgr Antonio Luiz Catelan Ferreira, Mgr Etienne Vetö, I.C.N., Fr. Mario Ángel Flores Ramos, Fr Gaby Alfred Hachem, Fr. Karl-Heinz Menke, Prof. Marianne Schlosser, and Prof. Robin Darling Young.

General discussions on this subject took place both at the various meetings of the Sub-Commission and at the plenary sessions of the Commission itself, held in the years 2022-2024. This text was put to the vote and unanimously approved in forma specifica by the members of the International Theological Commission at the plenary session of 2024. The document was then submitted for approval to its President, His Eminence Cardinal Víctor Manuel Fernández, Prefect of the Dicastery for the Doctrine of the Faith, who, after receiving the favourable opinion of the Holy Father, Pope Francis, authorised its publication on 16 December 2024.

 

Introduction: Doxology, theology and proclamation

1. On 20 May 2025, the Catholic Church and the whole Christian world remember with gratitude and joy the opening of the Council of Nicaea in 325: ‘The Council of Nicaea is a milestone in the Church’s history. The celebration of its anniversary invites Christians to unite in a hymn of praise and thanksgiving to the Holy Trinity and in particular to Jesus Christ, the Son of God, “consubstantial with the Father”, who revealed to us this mystery of love.’[1] This has remained in Christian consciousness mainly through the Creed, that Symbol which gathers, defines and proclaims faith in salvation in Jesus Christ and in the One God, Father, Son, and Holy Spirit. The Nicene Symbol professes the good news of the integral salvation of human beings from God himself in Jesus Christ. 1,700 years later, we are celebrating this event above all with a doxology, a praise of the glory of God, since this glory has been manifested in the priceless treasure of faith expressed by the Symbol: the infinite beauty of the God who saves us, the immense mercy of Jesus Christ our Saviour, the generosity of the redemption offered to every human being in the Holy Spirit. We join our voices to those of the Fathers, like Ephrem the Syrian, to sing this glory:

Glory to that One Who came
to us by His First-born.
Glory to that Silent One 
Who spoke by means of His Voice.
Glory to that Sublime One
Who was seen by means of His Dawn.
Glory to the Spiritual One
Who was well-pleased that
His Child should become a body so that 
through Him His power might be felt
and the bodies of His kindred might live again![2]

2. The light shed by the assembly of Nicaea on Christian revelation allows us to discover an inexhaustible richness that continues to deepen over the centuries and across cultures, and to show itself in ever more beautiful and fresh ways. These different facets become current for today especially through the prayerful and theological reading that the greater part of Christian traditions give to the Symbol, each with a different relationship to the very fact of the existence of a symbol. It is also an opportunity for them all to rediscover or even to discover its richness and the bond of communion between all Christians which it can constitute. ‘How can we not recall the extraordinary importance of such a commemoration in the search for the full unity of Christians?’, asks Pope Francis.[3]

3. The Council of Nicaea was the first council called ‘ecumenical’, because for the first time the bishops of the entire Oikoumenē were invited.[4] Its resolutions were therefore intended to have an ecumenical, that is to say “universal” significance: they were received as such by believers and by Christian tradition in the course of a long and laborious process. The ecclesiological implications are crucial. The Symbol is part of the gradual adoption by Christian teaching of the Greek language and forms of thought, which were themselves, so to speak, transfigured by their contact with Revelation. The Council also marked the ever-increasing importance of synods and synodal modes of government in the Church of the first centuries, while at the same time constituting a major turning-point: in line with the exousia conferred on the Apostles by Jesus and the Holy Spirit (Lk 10:16; Acts 1:14-2:1-4), the event of Nicaea opened the way to a new institutional expression of authority in the Church, the authority of universal scope henceforth recognised in the ecumenical councils, as much for doctrine as for discipline. This decisive turning-point in the manner of thinking and governing in the community of the disciples of the Lord Jesus will have thrown light on essential elements of the Church’s teaching mission, and therefore of its nature.

4. A clarification is in order before going any further. We are basing ourselves on the symbol of Nicaea-Constantinople (381) and not, strictly speaking, on the one composed at Nicaea (325). In fact, it took about fifty years to accept the vocabulary of Nicaea’s Symbol and to agree on the universal significance of the first Council. The process of accepting the Nicene symbol continued during the conflict with the Pneumatomachi between Nicaea and Constantinople, introducing some significant textual changes, particularly in the third article. In the opinion of the Fathers, however, this process, which culminated in the Nicene-Constantinopolitan Symbol, did not involve any alteration of the Nicene faith, but its authentic preservation. In this sense, the preamble to the dogmatic definition of Chalcedon, which was preceded by the transcription of the symbol of Nicaea and the symbol of Nicaea-Constantinople, ‘confirms’ what was said in the symbol of the ‘150 Fathers’ (Constantinople), since its meaning lies, in its own terms, in the specification of what concerns the Holy Spirit against those who deny his lordship.[5] The magnitude of what happened at Nicaea can be seen in the prohibition of the Council of Ephesus against promulgating any other formula of faith,[6] for in the period after Nicaea, the proponents of orthodoxy thought that the discernment crystallised in the Nicene symbol would suffice to guarantee the faith of the Church for all time. Athanasius, for example, said of Nicaea that it is ‘the word of God that abides forever’ (Is 40:8).[7] This living and normative process of Tradition continued between the fourth and ninth centuries, with its adoption in baptismal liturgies, particularly in the East, and then in Eucharistic liturgies. It should be noted that the Filioque, which is found in the current Western versions of the Creed, is not part of the original text of the Nicene-Constantinopolitan Creed, on which this document is based.[8] This point continues to be a subject of misunderstanding between the Christian confessions, such that the dialogue between East and West continues to this day.

5. So, in the first chapter, we shall propose a doxological reading of the Symbol in order to draw out its soteriological and therefore Christological, Trinitarian and anthropological resources. This will be an opportunity to underline its significance and to receive from it a new impetus for Christian unity. But welcoming the richness of the Council of Nicaea, 1,700 years on, also leads us to perceive how the Council nourishes and guides everyday Christian life: in a second chapter, with its patristic content, we shall explore how liturgical life and the life of prayer were made fruitful in the Church after the Council. Nicaea was such a turning-point in the history of Christianity that, in the third chapter, we shall look at how the Symbol and the Council bear witness to the event of Jesus Christ himself, whose irruption into history offers unprecedented access to God and introduces a transformation of human thought, in other words, an event of Wisdom. The Symbol and the Council also bear witness to something new in the way the Church of Christ structures herself and accomplishes her mission: they translate what was an Ecclesial event. Finally, in the fourth chapter, we shall analyse the conditions of credibility of the faith professed at Nicaea in a moment of fundamental theology, which will revisit the nature and identity of the Church as the authentic interpreter of the normative truth of the faith through the Magisterium, guardian of believers, especially the smallest and most vulnerable.

6. ‘When a lamp is lit, it is not put under a bushel, but on the lampstand, and it shines for all who are in the house’ (Mt 5:15). This light is Christ, ‘the light from light’. To wonder at this light is also to find a new impetus to present this good news with even greater strength and creativity in the Holy Spirit. This light shines vividly on our times, which are plagued by violence and injustice, filled with uncertainty and a complex relationship with the truth, and in which faith and belonging to the Church seem to be under threat. The light is all the more vivid and radiant when it is shared by all Christians who can confess their faith in the same martýria, the same witness, in order to help draw the men and women of today to Jesus Christ, Son of God and Saviour:

What is essential, most beautiful, most attractive and at the same time most necessary for us is faith in Jesus Christ. Together, God willing, we will solemnly renew our faith in the forthcoming Jubilee, and each one of us is called to proclaim it to every man and woman on earth. This is the fundamental task of the Church.[9]


Chapter 1

The Symbol for salvation:

doxology and theology of the Nicene dogma

7. To celebrate Nicaea on its 1,700th anniversary is, first and foremost, to wonder at the Symbol bequeathed to us by the Council and at the beauty of the gift offered in Jesus Christ, of which it is like an icon in words. We shall therefore begin our study of Nicaea by examining this Symbol in order to bring out the extraordinary immensity of the Trinitarian faith, Christology, and soteriology it expresses, as well as its anthropological and ecclesiological implications, before concluding with its ecumenical significance. It is, so to speak, an act of doxological theology. It does not aim to go into depth on each theme of this ‘concentrate of Christian faith that is the Creed – a task that would have been of little use and in any case impossible within the framework of the present work – but it does seek to draw out the richness of the statements and truths offered by the Nicene Creed from a dogmatic point of view, particularly those that present the greatest challenge and fruitfulness for this period in the history of the Church and the world, at the very moment when we are celebrating the anniversary of Nicaea.

1. Grasping the immensity of the three divine Persons who save us: ‘God is Love’ – infinitely

8. The Nicene-Constantinopolitan symbol is structured around the affirmation of the Trinitarian faith:

We believe in one God the Father Almighty, creator of heaven and earth,
of all things visible and invisible,
And in one Lord Jesus Christ, the Son of God, the only-begotten,
who was begotten of the Father before all ages, light from light,
true God from true God, begotten not created, consubstantial with the Father,
by whom all things were made; [...]
And in the Holy Spirit, who is the Lord and giver of life, who proceeds from the Father,
who with the Father and the Son is co-adored and co-glorified,
who has spoken through the prophets [...].
[10]

1.1 The greatness of the fatherhood of God the Father, foundation of the greatness of the Son and the Spirit

9. The starting-point of the Nicene faith is the affirmation of the unity of God. Christianity is fundamentally a monotheism, in continuity with the revelation made to Israel. However, the Symbol does not first of all posit ‘God’ as such, and even less so the one divine nature, but rather the First divine hypostasis, which is the Father. As ‘creator of heaven and earth’ (cf. Gen 1:1; Ne 9:6; Rev 10:6), he is Father of all things.[11] Moreover, Christ reveals God’s unheard-of intra-divine paternity, the foundation of his paternity ad extra. If Christ is the divine Son in a unique way, this implies that there is a generation in God: God the Father gives everything he has and everything he is. God is not a poor and selfish principle: he is sine invidia.[12] His fatherhood, like his omnipotence, is the capacity to give himself entirely. This paternal gift is not merely one aspect among others, but defines the Father, who is entirely fatherhood.[13] God has always been a Father, and has never been a ‘solitary’ God.[14] This fatherhood of the One God is the first aspect of the Christian faith that provokes wonder and whose immensity we must celebrate by rediscovering Nicaea 1,700 years on. Our aim is to explore the implications of this for our understanding of the Trinitarian mystery.

10. Faith in the Father bears witness to the superabundant fullness of God. The first article is not simply a definition of God, but first and foremost a praise that is part of the doxological tradition of the Jewish liturgy and the first Christian liturgies.[15] The ‘all-powerful (pantokratōr)’ God echoes various Old Testament expressions, such as, for example, ‘Lord Sabaoth’, taken up in the New Testament as part of the heavenly liturgies (Rev 4:8; 11:17; 15:3; 16:14; 19:6).

11. The revelation in Christ of the fatherhood of God also manifests the immensity of the Son and of the Spirit. If God the Father gives everything but his fatherhood, this means that the Son and the Spirit are fully equal to the Father in their divinity. In the Symbol, the Son is ‘one’, he is ‘Lord’ (Kyrios, which translates the Tetragrammaton in the Septuagint), ‘Son of God’, ‘the only begotten’ (ho monogenēs) in the Father’s intimacy, ‘God from God’, ‘light from light’, ‘true God from true God’, consubstantial (homoousios) with the Father. We should note, for example, that in the Fourth Gospel, the Son is called theos several times: Jn 1:1; 5:18; 20:28. The Son is begotten ‘before all ages, which means in the Symbol that he is co-eternal with the Father (cf. Jn 1:1). This is aimed at the positions of Arius, according to whom ‘there was a time when [the Son] was not’, ‘before he was born he was not’, and ‘he came to be from what was not’,[16] or ‘the Son is from nothing’ by the ‘will and counsel’ of the Father.[17] This is why the Son can be confessed as the one ‘through whom all things were made’ (cf. 1 Cor 8:6; Jn 1:3). God is so great that the Father is able to beget another who is equal to him in divinity. God exceeds all that we can conceive or imagine, because his Unity assumes a real plurality that does not rupture the Unity.

12. The Father also gives everything to the Spirit, who is defined in terms specific and reserved to the divinity: ‘Spirit’, ‘Holy’ and ‘Lord’ (once again recalling the Tetragrammaton). Just as the Father is the creator and the Son is the Word through whom the Father creates all things, the Spirit is professed to be the ‘giver of life’. Just as the Son is begotten of the Father, the Spirit ‘proceeds from the Father’. The statements on the Spirit intentionally echo the article on the Son.[18] Consequently, the Spirit can and must be worshipped with the Father and the Son – this confirms the doxological character of the Symbol.

13. It is essential to maintain both the divinity of the Spirit as the ‘third’ in God and his bond with the Father, as well as with the Son. Indeed, even today there are still difficulties in considering him as a divine Person in his own right and not as a mere divine or even cosmic force. We sometimes pray to the Father and the Son, omitting the Spirit, contrary to the prayer of the Church, which is always addressed to the Father, through the Son, in the Holy Spirit. One can recognise the rightful importance of the Eucharist, the Virgin Mary and the Church, without realising how precious they are precisely because they are given life by the Spirit.[19] Conversely, others will give a central, even exclusive place to the Holy Spirit, to the point of pushing the Father and the Son into the background, which paradoxically amounts to a form of pneumatological reductionism, since he is the Spirit of the Father and Spirit of the Son (Gal 4:6; Rom 8:9). The superabundant greatness of the Holy Spirit expressed in the faith of Nicaea is a protection against such reductionism.

14. Thus, from the fontal fullness of the fatherhood of God flows the superabundant fullness of God the Father, Son and Spirit, semper major. Now the fontal fullness of the Father implies a taxis (an order) in the life of the Triune God. The Father is the source of all divinity.[20] The second person is indeed God and light, but he is God from God and light from light. While the Spirit is confessed to be equal in divinity with the Son and the Father, he is presented in a rather different way from the other two. We have just seen (cf. supra § 12) that he is presented with divine characteristics and must be adored with the Father and the Son. Having said this, the differences in expression are notable: what is said of the Father and the Son as ‘one’ or of the Son as ‘consubstantial’ is not repeated with regard to the Spirit. Without taking anything away from his co-divinity, the way in which the Spirit is mentioned in the Symbol emphasises his personal distinction. In this way, the Holy Spirit's uniqueness highlights the uniqueness of each divine person. In a way, in God, ‘hypostasis’ or ‘person’ is an analogous term, in the sense that each of the three divine ‘names’ is fully a person, but is so in a unique way. This uniqueness also shows that equality, on the one hand, and difference and order, on the other, do not contradict each other. This too is the fruit of the Father's superabundant fatherhood. Receiving Nicaea means receiving the richness of the divine fatherhood that establishes equality but also difference and oneness.

1.2 A reflection on recourse to the expression homoousios

15. One of the central contributions of Nicaea is the definition of the divinity of the Son in terms of consubstantiality: the Son is ‘consubstantial’ (homoousios) with the Father, ‘begotten of the Father’, ‘that is, of the substance of the Father’.[21] The generation of the Son is something other than creation, because it is a communication of the unique substance of the Father. The Son is not only fully God like the Father, but of a substance numerically identical to his own, for there is no division in the one God.[22] Let us repeat: the Father gives everything to the Son, according to the logic of a divine life, which is agapē and which always exceeds what the human mind can conceive.

16. For the first time, non-scriptural terms are used in an official and normative ecclesial text - we shall come back to this in chapters III and IV. The intention of the Council Fathers was not to introduce something new into the apostolic faith, but to protect it by making explicit what generation in God really is. This is why, in the symbol of 325, homoousios is introduced by the expression ‘that is to say’: ontological Greek terminology is at the service of traditional scriptural expressions.[23] The term, of Gnostic origin and condemned by the regional synod of Antioch (264-269), was hotly disputed in the decades following Nicaea. But from the 360s onwards, the number of its adherents increased, until it was fully and peacefully ratified at Constantinople (381). At that time, its role in clarifying and protecting the faith was recognised, as was the creative capacity of human reason, philosophy and culture in accepting Revelation. As with the Sacred Scriptures, this underlines the fact that Revelation implies a dialogue between God and humanity, a dialogue that takes place on both sides through human words that are situated, limited, and therefore always to be interpreted. Not only is divine life revealed as superabundance, but the very form of Revelation, capable of being expressed in human words, and soon to be translated into every language, is shown here to be semper major.

17. However, this expression is not the only one used in the symbol to express the saving divinity of the Son. It is inserted among a series of terms of scriptural and liturgical origin: ‘true God from true God’, ‘God from God’[24] and ‘light from light’. No single term can exhaust the superabundant fullness of Revelation. Faith needs the articulation of scriptural, philosophical and liturgical expressions, concepts, images and divine names (Father, Son, Holy Spirit) to express itself in the most accurate and complete way. The ways in which the different Churches and ecclesial communities express themselves can be mutually supportive in this rediscovery, as some place greater emphasis on one or other: for example, the Eastern tradition emphasises the understanding of Christ as ‘light from light’.[25] The plurality of vocabulary certainly helps to make the faith it expresses accessible in different cultures and according to the forma mentis of each human being.

1.3 The unity of the history of salvation

18. To fully understand the significance of the Nicene-Constantinopolitan symbol, it is necessary to understand the unity of the framework of salvation history that informs the profession of faith. In fact, the attribution of creation or the ‘gift of life’ to the three Persons underlines the unity between the order of creation and the order of salvation. Divinisation begins with the creative act, and salvation history begins with creation. Against Marcionism and the various forms of Gnosticism, we must hold that it is the same God who creates and saves, and the same created reality, good because willed by God, which is restored in redemption. Thus, grace does not introduce a rupture but offers a fulfilment, because it is already at work in the creation that is ordered to it.

19. In the same way, the economy of salvation accomplished in Christ is presented in its true and full meaning only if its fidelity to the revelation made to the people of Israel is emphasised, without which the faith expressed at Nicaea would lose its legitimacy and the fullness of its historical dimension. Obviously, the Trinitarian and Christological dimension of the Nicene faith is not accepted by the rabbinic tradition but, from a Christian point of view, it is understood in an essential way as a newness that is nevertheless in continuity with the revelation entrusted to the chosen people. The doctrine of the Trinity is certainly not intended as a relativisation, but as a deepening of faith in the one and only God of Israel.[26] We have already emphasised that references to God as ‘one’ and ‘creator of heaven and earth’ echo the Old Testament, where God is revealed as the one who creates out of love, enters into relationships out of love and calls to be loved in return. God calls Abraham his ‘friend’, ‘the one he loves’ (Is 41:8; 2 Chr 20:7; Jas 2:23), and he speaks with Moses ‘face to face, as one speaks with another’ (Ex 33:11). Similarly, the choice of homoousios is made precisely to protect the monotheistic character of the Christian faith: in God, there is no reality other than the divine reality. The Son and the Spirit are none other than God himself, and not intermediary beings between God and the world or mere creatures. Furthermore, the revelation made to Israel bears witness to the Lord as the One and Only who commits himself, vows himself, and communicates himself in the history of humankind. Christianity understands the Incarnation as the unprecedented fullness of the way of acting (the economy) of the God of Israel who descends and dwells in the midst of his people, realised in the union of God with a singular humanity, Jesus.[27]

20. Moreover, the development of the Trinitarian faith as expressed at Nicaea is not without a Jewish background. The Symbol is structured by a threefold repetition: ‘We believe in one God the Father... and in one Lord Jesus Christ... and in the Holy Spirit.’ Indeed, the emerging Trinitarian faith of the first centuries developed the unity of the divine names, Father, Son and Spirit, from the monotheistic faith of Israel expressed at the beginning of the Sh'ma Israel, ‘the Lord our God is one’ (Dt 6:4), by repeating this central prayer of Judaism, extending the attribute of the unity of the One God to the Son: ‘I believe in one God... and in one Lord...’. This is already the case in the early New Testament expressions of Trinitarian faith: ‘For us there is one God, the Father, from whom all things come, and we are for him; and one Lord Jesus Christ, through whom all things exist, and we exist through him’ (1 Cor. 8:6, emphasis added). These ‘binitarian’ formulae co-exist with ‘trinitarian’ formulae: ‘There is one body and one Spirit [...]; there is one Lord, one faith, one baptism; there is one God and Father of all, who is above all and through all and in all’ (Eph 4:4-6, emphasis added; cf. also 1 Cor 12:4-6). Obviously, the content of the liturgy quickly evolved towards conceptions that could not be accepted by the rabbinic tradition, but the Christian faith developed from within Jewish liturgical structures. We should also emphasise the polyhedral richness of Israel's monotheism, as revealed in the Hebrew Bible and the writings of the Second Temple period.[28] There is the idea of a superabundant richness in God that does not contradict his unicity and unity. This can be seen in the multiplicity of the figures of God, such as the ‘binitarian’ dimension, in a certain sense, that some specialists perceive in the duality between the ‘Ancient of Days’ and the one who is ‘like a son of man’ (Dan 7:9-14).[29] This richness is further manifested in the different figures of God employed during his action in the world: the Angel of the Lord, the Word (dābār), the Spirit (rûaḥ) and Wisdom (ḥākmâ).[30] Some contemporary exegetes, moreover, maintain that there was an initial binitarian stage in the Christian confession of faith, which naturally inscribed the confession of faith in Jesus of Nazareth as Kyrios exalted after death, with a properly divine rank, within the continuity of the monotheism expressed in the Bible.[31] Thus, even if it is vital not to project Trinitarian faith back onto the Old Testament, it is nevertheless possible to perceive between the Old and New Testaments a process of development, albeit non-linear, a form of bringing together these different realities in two figures: the Son-Logos and the Spirit. When the affirmation of two other divine persons was seen as an association extrinsic to the one God, the recognition of the Christian idea of an intrinsic fruitfulness of the Father within the one and indivisible substance of the three co-eternal persons was missed.

2. Grasping the immensity of Christ the Saviour and his saving act

21. At the heart of the second article of the Nicene-Constantinopolitan symbol is the confession of the incarnation and redemptive act of the Son. After professing the divinity of Christ, the Son of God, we also confess that:

[We believe in one Lord Jesus Christ]
who for the sake of us human beings and for our salvation came down from heaven,
was incarnate of the Holy Spirit and of the Virgin Mary
[32] and became human,
was crucified for us under Pontius Pilate, suffered and was buried,
was raised on the third day according to the Scriptures and ascended into heaven,
sits at the right hand of the Father and will come again in glory to judge the living and the dead,
and his kingdom will have no end.

2.1 Seeing Christ in all his greatness

22. Nicaea allows us to ‘see Christ in all his greatness’.[33]  The two dimensions that make him the unique mediator between God and humanity are marked by the mention of the two agents in the incarnation: “He became incarnate of the Holy Spirit and of the Virgin Mary.” He is fully God, coming from a Virgin by the power of the Spirit of God; he is fully human, born of a woman. He is homoousios with the Father but also with us, according to the later double statement of Chalcedon[34] - bearing in mind that the term homoousios cannot have a univocal meaning when it comes to relating the incarnate Son to the Father and to human beings. The Word made flesh is the Word of God itself, which assumes in a unique and irreversible way a singular and finite humanity. It is because Jesus was personally (hypostatically) identical with the eternal Son that he was able, by suffering human death in a tragic way, to remain in a living relationship with the Father and transform separation from God, sin and death (cf. Rom 6:23) into access to God (cf. 1 Cor 15:54-56; Jn 14:6b). It is because Jesus was a true human being – ‘in all respects like us, except for sin’ (Heb 4:15) – that he was able to bear our sin and pass through death. This double consubstantiality means that Christ alone can save. He alone can work salvation. He alone is the communion of human beings with the Father.[35] He alone is the Saviour of all human beings of all times. No other human being can be this before him or after him. The unheard-of perfect communion between God and humanity has been realised in Christ, beyond any form of realisation that human beings themselves can imagine.

23. There is no disguising the current difficulty of believing in the full divinity and humanity of Christ. Throughout the history of Christianity, and even today, there is a real resistance to recognising the full divinity of Christ. Jesus can more easily be seen as a master who initiates others into the spiritual life or as a political messiah preaching justice, whereas in his humanity he lives out his eternal relationship with the Father. But there is also a great difficulty in admitting the full humanity of Christ, who can experience fatigue (Jn 4:6), feelings of sadness and abandonment (Jn 11:35; Gethsemane) and even anger (Jn 2:14-17) and who, mysteriously but truly, does not know certain things (“only the Father knows the time...”, Mt 24:36). The eternal Son chose to live all that he is because of the infinity of his divine nature, which dwells in and through the finitude of his human nature.

24. It should be noted, however, that even if the part of the Creed devoted to the second person is the most developed, the Christological perspective contained in the Nicene faith is necessarily Trinitarian. Christ is semper major precisely because where he is, there is always more than him: the Father remains the Father, the ‘Holy One of Israel’. Of course, ‘he who has seen [Christ] has seen the Father’ (Jn 14:9), but, as Jesus says, ‘the Father is greater than I.’ (Jn 14:28) Arius himself saw this clearly when he quoted the Gospel: “Only one is good.” (Mt 19:17)[36] Moreover, Christ cannot be understood without the Father and the Holy Spirit: before being conceived as the God-Man and the Bridegroom, he is presented in the New Testament as Son of the Father and Anointed by the Spirit. In the same way, he does not save people without the Father, who is the source and end of all things - for he is filial union with the Father. He does not save people without the Spirit, who makes them cry ‘Abba, Father’ (Rom 8:15) and whose interior action enables human beings to be transformed and to enter actively into the movement that leads them to the Father.

2.2 The immensity of the act of salvation: its historical density

25. The greatness of the Saviour is also revealed in the superabundant fullness of the economy of salvation. Nicaea presents the realism of the work of redemption. In Christ, God saves us by entering history. He does not send an angel or a human hero, but comes himself into human history by being born of a woman, Mary, into the Jewish people (‘born of a woman, born under the law’, Gal 4:4), and by dying in a specific historical period, ‘under Pontius Pilate’ (cf. 1 Tim 6:13; see also Acts 3:13).[37] If God himself entered history, the economy of salvation is the place of his Revelation: in history, Christ authentically reveals the Father and the Spirit and gives full access to the Father in the Spirit. Moreover, because God enters into history, it is not just a question of a teaching to be put into practice, as in Marcionism or the ‘lyingly named’ gnosis, but of an effective action by God. The economy will be the place of God's saving work. We confess that a historical event has radically changed the situation of all human beings. We confess that the transcendent Truth is present in history and acts within it. This is why the message of Jesus cannot be dissociated from his person: he is for all of us ‘the way, the truth and the life’ (Jn 14:6) and not just another teacher of wisdom.

26. Despite its emphasis on history, the Symbol does not explicitly mention or refer to much of the content of the Old Testament or, in particular, the election and history of Israel. Obviously, a Symbol is not intended to be exhaustive. However, it is worth pointing out that this silence in no way means that the election of the people of the Old Covenant has lapsed.[38] What the Hebrew Bible reveals is not merely a preparation, but is already the history of salvation, which will continue and be fulfilled in Christ: ‘The Church of Christ recognises that the beginnings (initia) of her faith and her election are already to be found, according to the divine mystery of salvation, in the patriarchs, Moses and the prophets.’[39] The God of Jesus Christ is the ‘God of Abraham, Isaac and Jacob’, the ‘God of Israel’. Moreover, the Symbol discreetly emphasises the continuity between the Jewish people and the people of the New Covenant by mentioning ‘the virgin Mary’, which places the Messiah in the context of a Jewish family and a Jewish genealogy, and which also echoes the Old Testament text (Is 7:14 LXX). This creates a bridge between the promises of the Old Testament and the New, as will the expression ‘he was raised on the third day according to the Scriptures’ in the remainder of the article, where ‘Scriptures’ means the Old Testament (cf. 1 Cor 15:4). The continuity between the Old and New Testaments is seen again when the article on the Spirit states that he ‘has spoken through the prophets’, which perhaps represents an anti-Marcionite note.[40] Be that as it may, to be fully understood, this Symbol born of the liturgy takes on its full meaning when it is proclaimed in the liturgy and articulated together with the reading of the whole of the Holy Scriptures, Old Testament and New Testament. This places the Christian faith within the framework of the economy of salvation, which naturally and structurally includes the chosen people and their history.

2.3 The greatness of the act of salvation: the paschal mystery

27. The realism and Trinitarian dimension of salvation in Christ find their culmination in the Paschal Mystery. The Son, the light of God and true God, becomes incarnate, suffers, dies, descends into hell and rises again. This is another unprecedented innovation. Arius' difficulty concerned not only the unity of God as incompatible with the generation of a Son, but also the understanding of his divinity as incompatible with Christ’s passion. Yet it is precisely in Christ and only in Christ that we understand what God is capable of in his own right, beyond all the limits of our pre-comprehension. We must take seriously the cry of Jesus as the cry of the Son of God, expressed in the sweat of blood and in fear: ‘Father, if it is possible, let this cup pass from me’ (Mt 26:39b). The word homoousios itself helps us to realise the unheard-of nature of the kenosis of the Incarnation: only the affirmation that the Son is ‘consubstantial’ with the Father makes it possible to realise the radical nature and depth of what this same Son consented to by assuming the human condition. In a sense, we could say that the Son, semper major, truly becomes a minor, and that the Most High God descends to the lowest depths in Jesus Christ (cf. Phil 2:5-11). Now, even if Christ alone is born, suffers the Passion and dies, we can say that ‘unus de Trinitate passus est.[41]  The whole Trinity is involved, each person singularly, in the saving passion of Christ. In this way, the Passion reveals to us the truly divine meaning of ‘omnipotence’. The omnipotence of the Triune God is identical with self-giving and love. The crucified Redeemer is therefore not a concealment, but a revelation of the Father's omnipotence.

28. The fullness of Christ's redemptive act is only fully manifested in his resurrection, the fulfilment of salvation, in which all aspects of the new creation are confirmed. The resurrection bears witness to Christ's full divinity, which alone is capable of passing through and overcoming death, but also to his humanity, since it is the same humanity, numerically identical to that of his earthly life, that is transfigured and glorified. This is not a symbol or a metaphor: Christ is resurrected in his humanity and in his body. The resurrection transcends history, but took place at the heart of the history of human beings and of this human being Jesus. Moreover, it is profoundly Trinitarian: the Father is its source, the Spirit is its life-giving breath, and the glorified Christ lives – still in his humanity – within the divine glory and in unalterable communion with the Father and the Spirit. Let us note that it is the resurrection of Christ, ‘first-born from the dead’ (Col 1:18; cf. Rom 8:29), that reveals the eternal begetting of the Son, ‘first-born of all creatures’ (Col 1:15). Thus, divine fatherhood and sonship are not primarily developments of human models, even if they are expressed in culturally marked human words, but are sui generis realities of the divine life.

29. The Symbol emphasises that the resurrection of Jesus Christ continues until the end of time, when Christ ‘will come again in glory to judge the living and the dead, and his kingdom will have no end’. With the resurrection, victory is definitively won, but it must be fully realised in the Parousia. Christian hope is plenary: it is based not only on the ephapax of the Passion and Resurrection, or on the present gift of grace, but also on the ‘to come’ of the glorious return of Christ and his Kingdom. It should be noted that this aspect of the faith of Nicaea is better understood and receives greater force if it is also read in a context in which the Church listens to the Old Testament and to the faith of the Jewish people of today. The current messianic expectation of the people of Israel highlights the completeness of the messianic promises of peace on all the earth and justice for all in a completely renewed world (Is 2:4; 61:1-2; Mi 4:1-3), which Christians await with the Parousia. This can and must awaken Christian hope for the return of the Risen Lord, because only then will his redemptive work be fully visible.[42]

3. Grasping the immensity of the salvation offered to human beings and the immensity of our human vocation

30. To celebrate Nicaea is not only to wonder at the superabundant fullness of God and of Christ the Saviour, but also at the superabundant greatness of the gift offered to human beings and of the human vocation revealed therein. The mystery of God in its immensity is the revelation of the truth about the human being, who is also semper major. The aim here is to develop the soteriological and anthropological implications of the Trinitarian and Christological affirmations of the Nicene symbol, but also to take into account the teaching at the end of the third article on the Holy Spirit, which presents faith in the Church and in salvation:

[We believe] in one holy, catholic and apostolic Church.

We confess one baptism for the forgiveness of sins;

we look forward to the resurrection of the dead and the life of the world to come. Amen.

3.1 The greatness of salvation: entering into the life of God

31. Because Christ saves us, the Nicene faith confesses the ‘forgiveness of sins’ and ‘the resurrection of the dead’. The Symbol mentions sin because we need to know from what evil we have been delivered. Sin, in the strict theological sense, is not only the vice or fault that offends against the Creator’s intentions in the creature (cf. Rom 2:14-15), but also a deliberate rupture with God within a ‘theologal’ relationship with him. In this full sense, sinners become aware of their sin in the light of God's merciful love: sin must be ‘discovered’ by the work of grace itself so that it can convert hearts.[43] Thus, the revelation of sin is the first step in redemption and must be confessed as such.

32. With the exorbitant claim of the resurrection of the dead, the Nicene faith professes that salvation is full and complete. Humanity is freed from all evil, including the ‘last enemy’, which must be destroyed by Christ so that everything is submitted to God (cf. 1 Cor 15:25-26). Faith in the resurrection implies not simply the survival of the soul, but victory over death.[44] Moreover, human beings are saved not only in soul but in the body itself. Nothing that makes up a human being’s identity and humanity remains outside the new creation offered by Christ. Finally, this gift will be acquired for ever, because it unfolds in ‘the life of the world to come’, the eschăton fully realised. Since Easter, no sin has the power to separate sinners from God - at least if they grasp the hand of the Risen Crucified One, who reaches out to the depths of the abyss to offer himself to the lost sheep: ‘Neither death nor life, nor angels nor rulers, nor things present nor things to come, nor powers, nor height nor depth, nor any other creature, will be able to separate us from the love of God made manifest in Christ Jesus our Lord’ (Rom 8:38-39).

33. Because Christ saves us as true God, the resurrection means for us entry into divine life, humanisation and divinisation at the same time, as Jesus’ commentary on Psalm 81:6 in John 10:14 testifies: ‘You are gods’.[45] And because he saves us as Son, begotten of the Father, this divinisation is adoptive filiation and conformation to Christ; it is entry by the Holy Spirit into the Father's love. We are loved and regenerated by the very love with which the Father eternally loves and begets the Son. This is the soteriological implication of the fatherhood of God professed by Nicaea. Finally, because Christ saves us as Son, together with the Father and the Holy Spirit, this filiation is a real immersion into the Trinitarian relations. This is why the Symbol is born of the Trinitarian profession of baptismal faith, and why baptism is performed ‘in the name of the Father, and of the Son, and of the Holy Spirit.’ The immensity of the gift thus revealed is realised in the mystery of Christ's Ascension: ‘he ascended into heaven’, showing that Christ himself is ‘our heaven.’[46] The exalted Son will send the promised gift of God, the Spirit of Pentecost. Any more restricted vision of salvation would not be truly Christian.

3.2 The immensity of the human vocation to divine Love

34. All of the above cannot fail to have consequences for the Christian vision of the human being. The human being is also revealed in the superabundant greatness of his or her vocation as homo semper major. The Nicene symbol does not include an anthropological article in the strict sense, but human beings, in their vocation to divine filiation in Jesus, could be described as an object of faith. In accordance with the Sacred Scriptures, their true identity is revealed by the mystery of Christ and the mystery of salvation as a mystery in the strict sense, analogous to that of God and Christ, even if they surpass it incomparably.

35. This great mystery is linked first and foremost to that of the Triune God and of Christ. The revelation of the fatherhood of God is the revelation of the mystery of fatherhood itself: ‘I bow my knees before the Father, from whom all fatherhood in heaven and on earth is named.’ (Eph 3:14) The revelation of the Only-begotten Son, particularly in John, is the manifestation of filiation in the proper sense, which flows ontologically from the First Begetting and points to the mystery of the Trinity itself. In a kind of inversion of the relationship of understanding, it is Trinitarian paternity and filiation that illuminate and purify human paternity, maternity, filiation and fraternity, which are culturally situated and marked by sin. First of all, divine paternity shows that filiation is the most profound characteristic of human beings: each one is a gift given to himself or herself by God the Father and called to receive himself or herself from God and, in Him, from others and from the created world around them in order to become ever more themselves. For this reason, their identity and vocation are particularly revealed in Christ, the Incarnate Son, the ‘perfect human being’ who, ‘in the very revelation of the mystery of the Father and of his love, fully reveals human beings to themselves and makes clear to them the sublimity of their vocation.’[47] On the other hand, human beings are also called to participate in the mystery of fatherhood by being fathers and mothers in flesh and spirit. In the image of divine fatherhood, human fatherhood and motherhood imply self-giving, a full equality between parents and children, between those who give and those who receive, but also a difference and a taxis between them. Finally, there is no truly Christian anthropology that is not pneumatological. Only the Spirit ‘who gives life’ fully humanises human beings, making them sons and daughters, fathers and mothers. Analogously, we can undoubtedly speak of a form of co-spiration of the Spirit, or of a conjoined inspiration,[48] because our most fruitful actions and words are commensurate with the cooperation they offer to the Spirit, who through them consoles, elevates and guides. In this way, the truth and meaning of human fatherhood, filiation and fecundity must be revealed, because they are not just natural or cultural realities, but a participation in the way of being of the Triune God. They cannot be understood in depth without Revelation, nor can they be exercised without grace. This is yet more good news to be rediscovered today from Nicaea.

36. In a sense, the homoousios itself can have an anthropological significance. A human being has given access to God. Of course, Christ says in his own unique way: ‘He who sees me sees the Father’ (Jn 14:9), because of the mystery of the hypostatic union. However, this unique union in him is consistent with the mystery of the human being ‘created in the image and likeness of God’ (Gen 1:27). In this sense, every human being truly reflects God, and makes God known and accessible. Pope Paul VI expressed this paradox by emphasising that ‘to know the human being, the true human being, the integral human being, we must know God’, but also that ‘to know God, we must know the human being.’[49] These words must be taken in their fullest sense: not only does every human being show us the image of God, but it is not possible to know God without going via the human being. Moreover, as we saw above (§ 22), the Church will use the expression homoousios to express the community of nature of Christ as a true human being, ‘born of a woman (Gal 4:4), the Virgin Mary, with all human beings.[50] The two sides of this double ‘consubstantiality’ of the Incarnate Son reinforce each other to provide a profound and effective foundation for the fraternity of all human beings. We are, in a sense, brothers and sisters of Christ in the unity of the same human nature: “So he had to make himself like his brothers in every way.” (Heb 2:17; cf. 2:11-12) It is this bond in humanity that enables Christ, consubstantial with the Father, to draw us into his Sonship with the Father, and to make us children of God, his own brothers and sisters, and, consequently, brothers and sisters to one another in a new, radical, and indestructible sense.

37. The mystery of humanity in its great dignity is also illumined by the eschatological dimension of the Nicene symbol. Faith in the ‘resurrection of the dead’, also called the ‘resurrection of the flesh’,[51] affirms the beauty of the body and the beauty of what is lived in the world through the body, despite human fragility and limitations. It affirms the value of this concrete personal body, which will be raised up and transfigured, but will remain numerically identical.[52] It thus makes an ethical demand: if the genuine acts of love performed in and by the body in this life are in some way the first steps of the risen life, respect for the body implies living everything that touches it uprightly and with purity. It should be noted that Christologies that do not posit the full humanity of Christ run the risk of importing a conception of salvation as an escape from the body and the world, rather than as our full humanisation. Yet this anchoring in the world and the body, created good and fulfilled by the new creation, is one of the hallmarks of Christianity. Here we find the deep link between creation and salvation: all the human traits of Jesus received from Mary, his mother, are good news, and they invite every human being to consider what makes his or her own humanity concrete as good news.

38. Moreover, the hope of the resurrection, like that of ‘eternal life in the world to come’, attests to the immense value of the individual person, who is called not to disappear into nothingness or into the whole, but to an eternal relationship with the God who chose each person before the foundation of the world (cf. Eph 1:4). The election of Abraham, Isaac, and Jacob and the irrevocable covenant with the people of Israel already reveal the covenant that God wishes to make with all nations and every human being in indestructible fidelity. In the same way, the incarnation of the eternal Son in a single human being confirms, establishes and fulfils the inalienable dignity of the person as a brother or sister of Jesus Christ.

39. Our world today has an immense need to rediscover those aspects of the mystery of man that present him in his greatness, without ignoring his misery: ‘The human being infinitely surpasses the human being,’ said Blaise Pascal.[53] This Christian conviction challenges all forms of anthropological reductionism. Faith in the paternity, filiation and fruitful (‘pneumatic’) inspiration of human beings underpins and guides every authentic conception of human autonomy, freedom and creativity. These are rooted in God, Father, Son and Holy Spirit, for whom omnipotence, wisdom and love are one in the gift of self. Conversely, the loss of faith in the resurrection and eternal life will lead to a refusal to give the body its rightful place and to the sacred value of each individual in his or her uniqueness and transcendence. Yet the Creator has revealed his intentions to us: ‘You wanted them to be a little less than gods, crowning them with glory and honour.’ (Ps 8:6)

3.3 The beauty of the gift of the Church and of baptism

40. The various threads woven so far are tied together in the ecclesiological and sacramental affirmations of the Creed. The faith of Nicaea also means believing in the Church ‘one, holy, catholic and apostolic’ and in baptism ‘for the forgiveness of sins’. The Church and baptism are to be celebrated as gifts that are also semper majora. Because they confirm and manifest the superabundant fullness of all that is set out in the rest of the Symbol, they are the paradoxical objects of faith: it is a question of recognising in them much more than can be seen. The Church is one beyond her visible divisions, holy beyond the sins of her members and the errors committed through her institutional structures, catholic and apostolic beyond divisions of identity or culture and the doctrinal and ethical turmoil that constantly agitates her. In this sense, both ecclesiological ‘monophysitism’ and ‘Arianism’ must be avoided: the former underestimates, or even obscures, the human dimension of the Church, while the latter overlooks the divine dimension of the Church in favour of a purely sociological and functional vision. Similarly, in the faith, baptism is understood as the source of new life and purification from sin beyond what is visible in the imperfect lives of the baptised themselves which are sometimes distant from God. It unfolds and elevates the inviolable dignity of every human being by conforming them to Christ, priest, prophet and king.

41. To ‘believe’ in the Church and to ‘confess’ a single baptism is to receive a gift of faith which makes it possible for believers to discern at the very heart of their human and fragile dimension the active and sanctifying presence of the Holy Spirit. The Spirit makes the Church one, holy, catholic and apostolic, and gives baptism its efficacy. To ‘believe’ in the Church and in baptism is also to perceive in and through the Church the saving action of Christ. Just as Christ is the fundamental sacrament of God, his real and active presence in the real symbol of his humanity, so the Church is the ‘universal sacrament of salvation’.[54] Finally, to ‘believe’ in the Church and in baptism is to discern in them the presence of the Triune God. The Church is semper major, for she finds her source and her foundations in the Triune God, and in her live the Father, the incarnate Son and the Spirit. In her, the faith of Nicaea is proclaimed and celebrated – through baptism and the other sacraments: ‘Glory to you, Father and Son with the Holy Spirit in the holy Church.’[55]

42. At the crossroads between soteriology and anthropology, believing in the Church and confessing a single baptism confirms and unfolds the immensity of salvation and the mystery of the human being. Salvation is not simply an individual process, but a communal and supernatural one, received through the cooperation of other people who are our neighbours, and producing spiritual fruit for others who are also our neighbours.[56] This sheds light on the nature of the human being, who is not an isolated monad but a social being, inserted into a family, a nation, a community of faith, and into the whole of humanity.[57] Consequently, faith in the Church and in baptism implies that redemption is worked out in visible acts and structures, linked to the corporeal dimension of the individual and the social body, which unfold in history. These are the locus of the life-giving and inspiring Spirit, who works between and beyond their limits to reach every human being. At bottom, by bearing witness to the link between the individual and the whole, between corporeality and inscription in history, the Church is part of the work of Christ who ‘fully reveals human beings to themselves.’[58] In a particular way, as the ‘sacrament of unity’,[59] the Church professed by the faith of Nicaea is the sign and instrument of the unity of all these aspects of the human person and of humanity as a whole: the Christian vision of humanity explodes the narrowness of all reductionisms that reject either the community in favour of the individual or the individual in favour of the collective, and that do not tend towards unity.

4. Celebrating the immensity of salvation together: the ecumenical significance of the faith of Nicaea and hope for a common date for the celebration of Easter

43. The faith of Nicaea, in all its beauty and grandeur, is the common faith of all Christians. All are united in the profession of the Nicene-Constantinopolitan symbol, even if not everyone gives the Council and its decisions the same status. The year 2025 is therefore an invaluable opportunity to emphasise that what we have in common is much stronger, quantitatively and qualitatively, than what divides us: together, we believe in the Triune God, in Christ as truly human and truly God, and in salvation through Jesus Christ, according to the Scriptures read in the Church and under the guidance of the Holy Spirit. Together, we believe in the Church, baptism, the resurrection of the dead, and eternal life. The Council of Nicaea is particularly revered by the Eastern Churches, not simply as one Council among many or the first in a series, but as the Council par excellence, which promulgated the confession of faith of the ‘318 Orthodox Fathers’.

44. Consequently, the year 2025 is an opportunity for all Christians together to celebrate this faith and the Council that gave it expression. Theological ecumenism rightly focuses its attention and efforts on the unresolved knots of our differences, but it is undoubtedly just as fruitful, if not more fruitful, to celebrate together, in order to move towards the re-establishment of full communion between all Christians, so that the world may believe. We have already emphasised how the insistence of the different Christian traditions makes it possible to highlight the richness of the text of the Symbol (cf. supra § 17). The common celebration of Nicaea could be an ecumenical journey of mutual enrichment that will offer, along the way, a better understanding of the mystery, greater communion between ecclesial traditions, and a stronger attachment to the common profession of the Christian faith.

45. One of the aims of Nicaea was to establish a common date for Easter to express the unity of the Church throughout the Oikoumenē. Unfortunately, there is still no unanimous agreement on a common date. The divergence of Christians over the most important feast in their calendar creates pastoral damage within communities, even to the point of dividing families, and causes scandal among non-Christians, thus affecting the witness given to the Gospel. This is why Pope Francis, the Ecumenical Patriarch Bartholomew, and other Church leaders have repeatedly called for a common date for celebrating Easter. It so happens that in 2025, Easter is celebrated on the same date in both East and West. Would this not be a providential opportunity to continue celebrating the Passion and Resurrection of Christ, the ‘feast of feasts’ (Byzantine Matins of Easter), in communion across all Christian communities? There are a number of realistic enough proposals for an undivided date. On this question, the Catholic Church remains open to dialogue and to an ecumenical solution. Already in the appendix to the Constitution Sacrosanctum Concilium, the Second Vatican Council did not oppose the introduction of a new calendar, but stressed that this should be done ‘with the consent of those to whom this question is of importance, especially of the brethren separated from communion with the Apostolic See’.[60]  Note the importance attached by the Eastern world to the elements laid down in the aftermath of Nicaea to determine the date of Easter: Easter is to be celebrated ‘on the first Sunday following the full moon that follows or coincides with the vernal equinox’.[61] Sunday evokes the resurrection of Christ on the first day of the week, while the full moon following the spring equinox recalls the Jewish origin of the festival, 14 Nissan, but also the cosmic dimension of the resurrection, since the spring equinox evokes the moment when the length of day prevails over that of night and nature comes back to life after the winter.

46. It should be noted that it was at the Council of Nicaea that the Church decisively chose to separate itself from the date of the Jewish Passover. The argument that the Council wanted to distance itself from Judaism has been put forward, based on the Emperor Constantine's letters as reported by Eusebius, which include anti-Jewish justifications for the choice of an Easter date not linked to 14 Nissan.[62] However, a distinction must be made between the motivations attributed to the Emperor and those of the Council Fathers. In any case, nothing in the Council's canons expresses this refusal of the Jewish way of doing things. We cannot ignore the importance for the Church of the unity of the calendar and the choice of Sunday to express faith in the resurrection. Here today, as the Church celebrates the 1,700th anniversary of Nicaea, are once again some aims for reflecting on the date of Easter. Besides the question of the calendar, it would be desirable always to better underline the relationship between Easter and Pesaḥ in theology, in homilies as well as in catechesis, in order to reach a broader and deeper understanding of the meaning of Easter.

47. At Easter vigils and in every baptismal liturgy, the Nicene-Constantinopolitan symbol is proclaimed in its most solemn form, which is dialogue. This profession of faith, which is the foundation of individual Christian life and the life of the Church, will find its whole strength if it is rooted in the revelation made to our ‘elder brothers’ and our ‘fathers in the faith’[63] and lived in visible communion by all Christ’s disciples.


Chapter 2

The Symbol of Nicaea in the life of believers:

‘We believe as we baptize and we pray as we believe.’

 

Introduction: Living out the faith we confess

48. The faith professed at Nicaea has a rich dogmatic content that was decisive in establishing Christian doctrine. However, the challenge of this doctrine was and is still to nourish and guide the life of the believer. In this sense, it is possible to highlight a real spiritual treasure of the Council of Nicaea and its Creed, a ‘source of living water’ from which the Church is called to draw today and always. It was to protect access to this living water that Saint Anthony agreed to leave his hermitage to testify against the Arians in Alexandria.[64] This treasure is directly manifested in the way in which the Nicene faith was born of the lex orandi and nourished by it.[65] Moreover, the synods never intended to limit their debates to the speculative domain of statements of faith. On the contrary, the participants in these synods were keen to discuss the whole of ecclesial life, the best way to imbibe and practise the truths of the faith on a daily basis and, conversely, to regulate their teaching on liturgical, sacramental and even ethical orthopraxis.[66] The bishops, in short, spiritually brought with them to the councils the members of the body of the Church, with whom they shared the life of faith and prayer, and with whom they sang the praise and glory of the Father, the Son, and the Holy Spirit, one God. To grasp the spiritual and theological significance of the Nicene dogma, we need to explore how it was received in the liturgical and sacramental practice, catechesis and preaching, prayer and hymns, of the fourth century.

1. Baptism and Trinitarian faith

49. Even before the doctrine of the Trinity was developed theologically, faith in the Trinity was at the foundation of the Christian life celebrated in baptism. The profession of baptismal faith pronounced in the sacramental formula of baptism did not simply express a theoretical mystery but the living faith that referred to the reality of salvation given by God, and therefore to God himself. Baptismal faith provides a ‘knowledge’ of God that is at the same time an access to the living God. Thus, the apologist Athenagoras asserts: ‘There are [...] human beings [...] who allow themselves to be guided solely by the desire to know the true God and his Word, to know what is the unity of the Son with the Father, what is the communion of the Father with the Son, what is the Spirit, what is the union and distinction of the three persons thus united, the Spirit, the Son and the Father.’[67]

50. This is why the baptismal formula, in which the Father, Son and Holy Spirit are placed on an equal footing, constitutes the central argument against Arius and his followers, much more than recourse to theological reasoning. This is as true of Ambrose[68] and Hilary[69] as it is of Basil of Caesarea, Gregory of Nyssa and Ephrem the Syrian.[70] Likewise, Athanasius insists that the Son is named in the baptismal formula not because the Father is insufficient, nor simply by chance, but because:

He is the Word of God and God’s own Wisdom and, being his radiance (apaugasma), he is always with the Father. For this reason, when the Father dispenses grace, he can give it only in his Son, for the Son is in the Father as the radiance of light [...] He whom the Father baptizes, the Son also baptizes, and he whom the Son baptizes is sanctified in the Holy Spirit.[71]

51. That said, for Athanasius and the Cappadocian Fathers, it is not simply a matter of pronouncing the Trinitarian formula, but baptism presupposes faith in the divinity of Jesus Christ. Thus, the teaching of right faith is necessary and forms part of the proper practice of baptism. Athanasius cites as a basis the formulation of the precept in Mt 28:19: “Go ... teach ... and baptise.”[72] This is why Athanasius – like Basil and Gregory of Nyssa[73] – denies all efficacy to Arian baptism, because those who consider the Son to be a creature do not have a correct conception of God the Father: he who does not recognise the Son does not understand the Father either and does not ‘possess’ the Father, because the Father never began to be Father.[74]

2. The Symbol of Nicaea as a confession of faith

52. Not only is the Nicene confession of faith the expression of baptismal faith, but it may have come directly from a baptismal symbol of the Church of Caesarea in Palestine (if we believe what Eusebius says[75]). Three additions would have been made: ‘...that is, of the substance of the Father’, ‘begotten, not created’, and ‘consubstantial with the Father (homoousios)’. In this way, it is established with overwhelming clarity that the one who ‘took flesh for us human beings ... and suffered’ is God, homoousion tō Patri. Yet while he is ‘of the substance of the Father’ (ek tēs ousias tou Patros), he is distinct from the Father insofar as he is his Son.  Through him, who ‘became human for our salvation’, we know what it means that the Triune God ‘is love’ (1 Jn 4:16). These additions are essential and mark the proper originality and decisive contribution of Nicaea, but at the same time it must be constantly emphasised that the Symbol, as a symbol of faith, is originally rooted in the framework of the liturgy, which is its vital environment and therefore the framework in which it takes on its full meaning. It is certainly not a theoretical exposition but an act of the baptismal celebration, which is enriched by the rest of the liturgy and in turn enlightens it. Our contemporaries may sometimes have the impression that the creed is a highly theoretical statement because they are unaware of its liturgical and baptismal roots.

53. In this sense, the faith of Nicaea remains a ‘symbolon’ (‘ekthesis’, ‘pistis’), i.e. a confession of faith. It can be distinguished from an interpretation or a more precise technical theological definition designed to protect the faith (‘oros’, ‘definitio’), as proposed, for example, by the Council of Chalcedon. As a symbol, the Nicene Confession is a positive formulation and clarification of biblical faith.[76] It does not claim to be a new definition, but rather an evocation of the faith of the apostles: ‘Christ gave this faith, the apostles proclaimed it, the Fathers of all our Oikoumenē gathered at Nicaea handed it on (paradosis).’[77]

54. In the same way, it is because of its status as a confession of faith and precisely of the apostolic faith, and not as a definition or teaching, that the Nicene symbol is considered in the following period (at least until the end of the fifth century) as the decisive proof of orthodoxy.[78] This is why it was used as the basic text at subsequent councils. Thus, Ephesus and Chalcedon were intended to be interpretations of the Nicene Creed: they emphasised their agreement with Nicaea and opposed the positions taken by those who dissented from Nicaea. When the Nicene-Constantinopolitan Confession of Faith was read out at the Council of Chalcedon, the assembled bishops exclaimed: ‘This is our faith. This is what we were baptised in, this is what we baptise in! Pope Leo believed thus, Cyril believed thus.’[79] Note that the profession of faith may be expressed in the singular – ‘I believe’ – but it is often in the plural: ‘we believe’; similarly, the Lord's prayer is in the plural: ‘Our Father...’. My radically personal and singular faith is just as radically part of that of the Church as a community of faith. The Nicene Symbol and the Greek original of the Nicene-Constantinopolitan Symbol open with the plural ‘we believe, ‘to bear witness that in this “We”, all the Churches were in communion, and that all Christians professed the same faith.’[80]

55. As we mentioned in the previous chapter, to this day ‘Nicaea’ – ‘the confession of faith of the 318 Orthodox Fathers’[81] – is regarded in the Eastern Churches as the Council par excellence, that is, not as ‘one Council among others’, nor even as ‘the first in a series’, but as the norm of the right Christian faith. The ‘318 Fathers’ are explicitly mentioned in the liturgy of Jerusalem. Moreover, in the Eastern Churches, unlike the Western Churches, Nicaea has also been given its own commemoration in the liturgical calendar. It should be noted that the disciplinary issues dealt with at Nicaea were given a different weighting from the outset from that of the confession of faith. While majority decisions are possible for disciplinary matters, it is the apostolic tradition that is decisive for matters of faith: ‘With regard to the date of Easter, the Fathers wrote: “It has been decided.” As regards the faith, they did not write: “It has been decided”, but “So believes the Catholic Church!”[82]

3. Going deeper in preaching and catechesis

56. The Fathers of the East and West did not content themselves with arguing with the help of theological treatises, but also clarified the Nicene faith in sermons addressed to the people, in order to protect the faithful against erroneous interpretations, generally designated by the term ‘Arian’ – even if the ‘Homoeans’ of the West at the time of Augustine differed greatly from the ‘Neo-Arians’ of the East in their argumentation. The theological view that the Son is not ‘true God from true God’, but only the Father’s most eminent creature, and that he is not coeternal with him, was recognised by the Fathers as a persistent threat, and combated, even independently of actual opponents. The prologue to John's gospel offered just such an opportunity to explain the relationship between the Father and the Son, or between ‘God’ and his ‘Word’, in accordance with the Nicene confession.[83] Chromatius of Aquileia (ordained bishop in 387/388, died in 407), for example, passed on the Nicene faith to his followers without using technical terminology.[84] Even the Fathers of the Church, who were sceptical in principle about ‘theological debates’, took a very clear stand against ‘Arian impiety’ (‘asebeia’, ‘impietas’): the Arians understood neither the ‘eternal begetting of the Son’ nor the ‘original equality-eternity’ of the Father and the Son.[85] They were even mistaken in their monotheism by accepting a second, subordinate divinity. Their worship was therefore depraved and erroneous.

57. Thus, in his catecheses, John Chrysostom explains the baptismal faith that had been validly formulated at Nicaea,[86] and distinguishes the right faith not only from Homoean doctrine, but also from Sabellian doctrine: Christians believe in God as ‘one essence, three hypostases’. Augustine makes a similar argument in his instructions to candidates for baptism.[87] Gregory of Nyssa's Oratio catechetica magna, the most voluminous parts of which are devoted to the eternal and incarnate Word of God, can be considered the masterpiece of a catechesis that was clearly intended for those who should relay it, namely bishops and catechists. The theme is not only the relationship between the Son-Word and the Father (chapters 1, 3, 4), but also the significance of the Incarnation as a redemptive action (chapter 5). Gregory wants to make it clear that birth and death are not something unworthy of God or incompatible with his perfection (chapters 9 and 10), and explains the Incarnation in terms of God's love for human beings. But he insists above all on the fact that Christian baptism is accomplished in the ‘uncreated Trinity’, that is, in the three co-eternal Persons. It is only in this way that baptism confers eternal and immortal life: ‘Indeed, he who subjects himself to a created being, unwittingly places his hope of salvation in that being and not in the divinity.’[88]

58. The heart of the debate is indeed an existential question rather than a theoretical problem: is baptism linked to ‘establishment in filiation’ (Basil), to ‘the beginning of eternal life’ (Gregory of Nyssa), to ‘salvation from sin and death’ (Ambrose[89])? This is only possible if the Son (and the Holy Spirit) is God. It is only when God himself becomes ‘one of us’ that there is a real possibility for human beings to participate in the life of the Trinity, that is, to be ‘divinised’.

4. Prayer to the Son and doxologies

59. The faith of Nicaea serves as a rule for personal and liturgical prayer[90] and these are marked by Nicaea. Although the ‘invocation of the name of the Lord (Jesus)’ is already attested to in the New Testament writings[91] and, above all, the hymns to Christ[92] bear witness to the offering of praise and adoration to him, prayer to the Son became a source of controversy in the Arian crisis.

60. Taking their cue from certain texts of Origen,[93] the Arians of the fourth century, as well as followers of Origen in the fifth and seventh centuries, were particularly opposed to liturgical prayer to the Son. The Arians had an interest in highlighting the passages of Scripture that show Jesus himself praying, in order to emphasise his inferiority in relation to the Father. Combined with the (Apollinarian) conception, also widespread among the Arians, according to which the Logos takes the place of Jesus' soul, the subordination of the Logos to the Father thus seemed to be proven. For them, therefore, prayer to the Son was inappropriate. In favour of their point of view, the Arians argued using the traditional wording of the doxology, which is of great importance, particularly in Eastern liturgies: ‘Glory and adoration to the Father through (dia / per) the Son in (en / in) the Holy Spirit.’[94]. The difference in prepositions was invoked as proof of an essential difference in persons. The Arians sought to use the liturgy – recognised as a witness to the faith of the Church – to prove what they considered to be theologically justified.

61. On the other hand, the defenders of Nicaea argued that the practice of prayer should correspond to faith, but that faith in turn corresponded to baptism. The baptismal formula manifests the equal dignity of the Father, the Son and the Holy Spirit. It follows that prayer – whether personal or liturgical – can and must also be addressed to the Son. Although they did not reject the ancient formula of the doxology, but defended its orthodox meaning,[95] they preferred other formulations and prepositions: ‘tō Patri, kai...kai’, ‘tôi Patri, dia... sun’, which are also attested in the biblical and liturgical tradition.[96] Basil thus refers, among others, to the very ancient hymn ‘Phōs hilăron’ (perhaps from the 2nd century), in which the Father, Son, and Spirit are the object of a song of adoration.[97]

62. The principle, «we are baptized, so, also, do we believe; as we believe, so, also, do we give glory»[98] also applies to personal prayer. The invocation of Jesus – as practised in forms of prayer to Jesus, especially in monastic circles – is explicitly justified by the invocation of ‘homoousios tôi Patri’. ‘When we say “Jesusˮ, explains Chenouté, a Coptic father of the fifth century, ‘the Most Holy Trinity is also named.’ When the Incarnate Son is invoked, he is not invoked separately from the Father and the Holy Spirit. Anyone who does not want to pray to Jesus is following the ‘new impiety’; he does not understand anything about the Trinity, nor does he understand anything about “Jesus”.’[99] The way someone prays shows what they believe.

63. Correctness in prayer has a soteriological dimension. It is Gregory of Nyssa who issues the most forceful warning here: the hope of the believer is more than morality in the current sense of the term, but is also expressed in prayer. Hope is directed towards the divinisation worked by God: if ‘the first great hope is no longer present in those who allow themselves to be led into doctrinal error’, the consequence is that ‘there was no advantage in behaving correctly with the help of the commandments’. And Gregory continues

So we are baptised as we received it, in the name of the Father and of the Son and of the Holy Spirit; webelieve as we are baptised; for it is fitting that faith should be in accord with confession; we glorify as we believe, for it is not natural that glory should fight against faith. But that in which we believe we also glorify. Also, since faith is in the Father, the Son and the Holy Spirit, and since faith, glory and baptism are mutually dependent, we do not distinguish between the glory of the Father, of the Son, and of the Holy Spirit.[100]

64. The addition of the Trinitarian doxology at the end of each psalm, the order of which is attributed to Pope Damasus (d. 384 AD), can be understood along these lines. Cassiodorus notes that all heresies are thus reduced to nothing:

O truly holy, spotless, perfect mother Church! […] Through all the psalms and all the canticles you interpose praise of the holy Trinity, so that confession and the sweetest glory might be rendered to the Persons of God to whom belong the consecrated words we utter […]. Though Sabellius goes detestably astray on the issue of the Fater, though Arius like a madman is awry on the Son, though Manes sacrilegiously denies the Holy Spirit, though others evily detract from the Old Testament and some do not pursue the grace of the New.[101]

This is particularly the case with the addition ‘sicut erat in principio...’, which has been understood as an unequivocal profession of anti-Arian faith.[102]

5. Theology in hymns

65. Finally, hymns were a locus that gave expression to the Nicene faith, which found a place in the life of the believer, informed by Nicaea. Thus many hymns end with the Trinitarian doxology. Moreover, confrontation with the Arian heresy played an important role in the development of Christian poetry. Hymns and songs were first composed in the East,[103] in response to the propaganda poems of heterodox groups. As for the West, it could even be said that its most important theological contribution in the fourth century was the composition of hymns.

66. Apart from John Chrysostom, it was above all Ephrem the Syrian (306-373) who, in his theological poetry (which later left its mark on all classical Syriac literature) and especially in the hymns De fide and De nativitate, sang of the mystery of Christ: Christ is God, despite the weakness of his human nature; Christ's kenosis is such a great miracle only because he is God and remains God in this self-emptying.[104] It is with profound piety that Ephrem describes the intra-trinitarian relations: the Son is in the Father ‘before all time’, he is ‘equal to the Father and yet distinct from him.’[105] He readily uses the image of the sun, its light and its heat, which are joined in unity.[106] He constantly refers to the three ‘names’ to which the divine reality corresponds and in which ‘our baptism and justification consist.’[107] He does all this while making clear the context of the Nicene faith, since he cites ‘the glorious synod’, clearly referring to Nicaea.[108] Other Syriac theologian-poets of the fifth century, such as Isaac of Antioch and Mar Balai, composed sermons and metrical chants addressed to Christ himself, explicitly glorifying him with divine attributes: ‘Praise be to Him [Jesus Christ] and to His Father, and glory to the Holy Spirit’ – ‘Praise be to Him, the Most High, who came to redeem us, praise be to Him, the Almighty, whose movement of the head governs the world.’[109]

67. Hilary learned to sing hymns during his exile and introduced them to Gaul; Ambrose also attests to having adopted the ‘custom of the East’ during the fierce conflicts with the Arians in Milan in 386-87. The Son is ‘always Son, just as the Father is always Father. How else could the Father bear this name if he had no Son?’, Hilary points out in the hymn Ante saecula qui manens, in which he describes the ‘double birth of the Son, who was born of the Father, for the Father who knows no birth, and born of the Virgin Mary, for the world’.

68. Unlike Hilary's highly theological hymns, which scarcely found a place in the liturgy, Ambrose's hymns quickly became famous everywhere and gave powerful encouragement to the faith, as Ambrose himself intended them. His morning hymn Splendor paternae gloriae could be seen as a commentary on the Nicene Confession. Particularly striking are the final stanzas of some hymns, which emphasise the equality of the Son with the Father, ‘Aequalis aeterno Patri..., or which address the Son directly, ‘Iesu, tibi sit gloria ... cum Patre et almo Spiritu. In a very short hymn, perhaps written by Ambrose, the confession of the one God in three persons is almost set down in verse as a key phrase for the faithful: “O lux beata trinitas, et principalis unitas...”.

69. Besides Ambrose, it is above all Prudentius (Aurelius Prudentius Clemens, 348-415/25) whose hymns are important for Christology. The Spanish poet was particularly impressed by the true divinity and humanity of the Redeemer, in whom our new creation is founded:

Christ is the figure of the Father, and we the figure and image of Christ ; we are made after the likeness of the Lord by the goodness of the Father, and Christ was to come into our likeness after ages of time.

Christus forma Patris, nos Christi forma et imago;
Condimur in faciem Domini bonitate paterna
Venturo in nostram faciem post saecula Christo.
[110]


Chapter 3

Nicaea as a theological and ecclesial event

70. To celebrate Nicaea is to grasp how the Council remains new. This eschatological newness, inaugurated on Easter morning, continues to renew the Church 1,700 years after the event of the resurrection. It is indeed an event in the strongest sense, a turning-point that is part of the fabric of history with its concatenations, but is also a point of concentration, introducing a real novelty and exerting a decisive influence on what follows. Depending on the language, the term ‘event’ refers to what ‘comes to’, the ad-ventus (avènement, Avent, avvenimento), or what ‘comes from’ (évènement, event), to the production of a fact (acontecimiento) or to the appearance of the new (Ereignis). Thus, Nicaea is the expression of a turning-point in human thought that comes to, comes forth, occurs, which has come about through the Revelation of the One and Triune God in Jesus, which makes the human spirit fruitful by giving it new content and new capacities. It is an ‘Event of Wisdom’. Likewise, Nicaea, which was after the event described as the first ecumenical council, was also the expression of a turning point-in the way the Church structured herself and ensured her unity and the truth of her doctrine through the same confession of faith: it was an ‘Ecclesial Event’. Evidently, in both cases, the newness is based on a prior process, on a given reality, the very reality it transforms. The Event of Wisdom presupposes human culture, assumes it, so to speak, in order to purify and transfigure it. The Ecclesial Event is based on the preceding evolution of the structures of the Church of the first centuries, itself rooted in the Jewish and Greco-Roman heritage.

71. Now the source of these two events is another, of divine initiative, the event of God's Revelation, the ‘event of Jesus Christ’. This is the Newness par excellence: the Novus is the Novum.[111] It is Revelation itself, while the Wisdom Event and the Ecclesial Event are part of the transmission of this primordial gift.[112] In it, God makes a covenant with a people in order to make a covenant with all peoples; he assumes a humanity in order to assume all humanity. Nicaea is the expression and the fruit of the Newness of Revelation, and it is for this reason that the Council of 325 offers a paradigm for every period of renewal of Christian thought, as well as of the structures of the Church. What is more, because Nicaea is born of the Novum that is Christ, it can be understood in a way that is ever renewed and it can continually enrich the life of the Church. It is therefore a question of first exploring the event that is the source, the event of Jesus Christ, and then examining its consequences for human thought and for the structures of the Church.

1. The Christ event: ‘No one has ever seen God. The one-begotten Son has revealed him.’ (Jn 1:18).

1.1 Christ, the Incarnate Word, reveals the Father

72. The Nicene symbol is the expression, the putting into words, of an unheard-of, assured and fully salvific access to God, offered by the event of Jesus Christ. In the Incarnation, life, Passion, Resurrection and Ascension into Heaven of the Word consubstantial with the Father, witnessed in Sacred Scripture and in the faith of the Apostolic Church, God semper major offers, on his own initiative, a knowledge and access to himself that only he can give, and which are themselves beyond what human beings can imagine and even hope for.[113] In fact, the New Testament transmits to the Church of all times, down the centuries, the testimony that Jesus gave of himself and that the Father, in the light and power of the Holy Spirit, confirmed it once and for all[114] in the Passover of the death, resurrection and ascension into heaven of the Son made flesh and the pentecostal outpouring of the Spirit, in the fullness of time, ‘propter nos homines et propter nostram salutem’. So, if it is true that ‘no one has ever seen God’, the faith of the Church testifies that Jesus, ‘the only Son of the Father, revealed him’ (Jn 1:18; cf. Jn 3:16.18 and 1 Jn 4:9). This testimony is summed up in the answer Jesus gave to the apostle Philip, who asked him: ‘Lord, show us the Father and we shall be satisfied.’ Jesus replied, Philip, have I been with you for so long and you do not know me? He who has seen me has seen the Father. How can you say, ‘Show us the Father?’ Do you not believe that I am in the Father and the Father is in me? What I say to you I am not speaking from myself, but the Father, dwelling in me, does his works (Jn 14:8-11).

73. If Jesus makes us see the Father, everything in him is access to the Father. Christ, in his fragile and vulnerable humanity, is the true expression of God the Father: ‘to see him is to see the Father. (cf. Jn 14:9)[115] As a result, God did not first hide himself on Golgotha under the powerlessness of the Crucified One, only to manifest himself on Easter morning, showing himself at last as he really is, as all-powerful. On the contrary, the love of Jesus Christ, who permits himself to be crucified and who, by suffering physical death, descends to the place where the sinner is imprisoned by sin (the šəʾôl or hell), is the revelation of the Love of the Triune God who does not operate by force, but who is precisely stronger than death and sin. It was precisely before the cross that Mark has a pagan centurion say: “Truly, this was the Son of God.” (Mk 15:39) As Pope Benedict XVI said in his book on Jesus,

The Cross is the true ‘summit’. It is the summit of love ‘to the end’ (Jn 13:1). On the cross, Jesus is ‘at the summit’, at the same height as God, who is love. It is there that we can ‘know’, that we can understand the ‘I am’. The burning bush is the Cross. The highest claim to revelation, the ‘I am’ and the cross of Jesus are inseparable.[116]

74. The knowledge of God through Christ does not offer a simple doctrinal content, but brings us into salvific communion with God, because it plunges us, so to speak, into the very heart of the reality, or better, the person to be known and loved. The prologue to John's Gospel is an expression of the highest contemplation of the mystery of God, manifested to us in Jesus so that we may enter, in the grace of the Holy Spirit poured out ‘without measure’ (Jn 3:34), into the very life of the Triune God revealed by the Logos. The figure of this Logos echoes not only the divine Logos discerned by Greek thought, but also, even more profoundly, the Old Testament heritage of the Word of God, the Dābār witnessed by the Old Testament. For the revelation made to Israel and passed on in the Old Testament already introduces us to a radically new knowledge of God that inaugurates this event of Revelation. This Logos, the Son, “God from God”, who has been with God from the beginning as his Word that expresses him in all truth, is also God like the Father. In the fullness of time, the Logos “became flesh and made his dwelling amongst us” (Jn 1:14), so that those who welcome him receive “the power (exousia) to become children of God” (Jn 1:14). Admitting human beings to full communion with him, the Logos made flesh has thus “made them partakers of the divine nature.”[117]

75. This unprecedented and authentic knowledge of and communion with God also brings about a salvific communion with the human brothers and sisters loved by God, because the event of Jesus Christ is inseparably communion with God and with every human being. The faith of the Apostolic Church bears witness to this communion in Christ and through Christ, within the Trinitarian communion:

We proclaim to you that which was from the beginning, that which we have heard, that which we have seen with our eyes, that which we have looked upon and touched with our hands, the Word of life [...], so that you too may have communion with us. Our communion is with the Father and with the Son, Jesus Christ. We write these things to you so that our joy may be complete (1 Jn 1:1, 3-4).

Theological tradition emphasises that charity makes us love God and our neighbour, insofar as the neighbour is a friend of God.[118] We may think that the three theological virtues introduce us to a full and radically new knowledge of God and communion with him. But according to the renewed access to God that they offer, they give us, in addition, a path of faith towards fraternity, an unheard-of hope in our neighbour, and that charity which forgives all and urges us to give of ourselves.

1.2 ‘We have the mind (νοῦς) of Christ’ (1 Cor 2:16): analogy of creation and analogy of charity

76. The event of Jesus Christ, by giving us access to God in an incomparable way, both gives rise to and implies a ‘way’ of access which is also new and unique: to accept the Symbol in faith and with understanding, better still to accept the God who is manifested in it, is to enter into the gaze of Christ consubstantial with the Father, into the ‘thought’ or the very mens of Christ and into his relationship with the Father and with others. ‘We have the mind of Christ (noun Christou),’ exclaims Saint Paul (1 Cor 2:16).[119] It is a cry of wonder. Here again, Nicaea shows the immensity of God's gift. But Nicaea also indicates that this is the only way to gain access to what the Creed expresses, both in letter and in spirit. We cannot contemplate the God of Jesus Christ, the redemption offered to us, the beauty of the Church and of the human vocation, and participate in them, without ‘having the mind of Christ’. Not simply by knowing Christ, but by entering into the very understanding of Christ, in the sense of a subjective genitive. One cannot fully adhere to the Symbol or confess it with one's whole being without “the wisdom that is not of this world”, “revealed by the Holy Spirit”, who alone “searches the depths of God” (cf. 1 Cor 2:6, 10):

In faith, Christ is not only the one we believe in – the greatest manifestation of God's love – but also the one with whom we are united precisely in order to believe. Faith not only looks to Jesus, but looks from Jesus’ point of view, with his eyes: it is a participation in his way of seeing. [...] Christ’s life, his way of knowing the Father, of living totally in relationship with him, opens up a new space for human experience, and we can enter into it.[120]

77. This is possible because Christ sees the Father through his human eyes and invites us to enter into his gaze. On the other hand, this path requires a profound transformation of our thinking, of our minds, which must involve conversion and elevation: ‘Do not be conformed to this world, but be transformed by the renewal of your mind.’ (Rom 12:2) And this is precisely what the event of Jesus Christ brings: the mind, the will, the capacity to love, are literally saved by the Revelation professed at Nicaea. They are purified, oriented, and transfigured. They take on new strength and unheard-of form and content. Our faculties can only enter into communion with Christ by being conformed to him in a process that makes believers ‘like (symmorphizomenos)’ (Phil 3:10) to the Risen Crucified One in their minds. This new way of thinking is characterised by the inseparability of knowledge and love. As Pope Francis points out: ‘Saint Gregory the Great wrote that “amor ipse notitia estˮ, love itself is knowledge, bearing within itself a new logic.’[121] It is merciful and compassionate knowledge, since mercy is the substance of the Gospel[122] and reflects the very character of the God of Jesus Christ, professed in the Nicene symbol. The renewed mens implies an understanding of analogy revisited in the light of the mystery of Christ. It holds together what we might call the ‘analogy of creation’, by virtue of which we perceive the divine presence in the peace of the cosmic order,[123] and what we might call the ‘analogy of charity’.[124] This analogy, inverted so to speak, in the face of the mystery of iniquity and destruction but illuminated by the stronger mystery of Christ's Passion and Resurrection, discerns the presence of the God of love at the heart of vulnerability and suffering. This wisdom of Christ is described in the First Letter to the Corinthians as that which ‘has made foolish the wisdom of the world’:

For Christ did not send me to baptise, but to preach the gospel, and to do so without using the language of human wisdom, which would empty the cross of Christ of meaning. For the language of the cross is foolishness to those who are on their way to their ruin, but to those who are on their way to their salvation it is the power of God. For Scripture says: ‘I will destroy the wisdom of the wise, and the intelligence of the intelligent I will reject. Where is the wise man? Where is the scribe? Where is the debater of this world? Has not God made foolish the wisdom of the world? Since the world, with all its wisdom, failed to recognise God, God was pleased, by a provision of his wisdom, to save believers by the proclamation of the Gospel (1 Cor 1:17-25).

This conversion and this transfiguration cannot take place without grace. Human understanding is revealed to be constitutively ordered for grace and relies on grace to be fully itself, just like humanity itself.[125] This is what enables us to understand how the human faculties, restored to themselves and transfigured by the event of Jesus Christ, are brought to their fulfilment by growing in the forms of faith, hope and charity, the first fruits in this world of the life of glory: ‘Have in yourselves the disposition which was in Christ Jesus.’ (Phil 2:5)

1.3 Entering into knowledge of the Father through the prayer of Christ

78. How can we enter into the ‘thought of Christ’ offered by the Jesus Christ event? Because Jesus Christ is not simply a teacher or a guide, but God’s own revelation and truth, those who receive him are more than just recipients of instruction. Because the person of the Risen One is not an object of the past, anyone who wants to understand the intimate mystery of Jesus, the revelation of God in his humanity, must allow himself to be included in his relationship of communion with the divine Father. This is done through the ‘theologal’ life, reading the Scriptures in the Church, personal and liturgical prayer, and especially the Eucharist.

79. Participation by grace in the prayer of Christ is the royal road to acknowledging Christ, which discloses knowledge of the Father (‘My Father and your Father’, in Jn 20:17). Joseph Ratzinger / Pope Benedict XVI declares: “Because prayer is the very centre of the person of Jesus, participation in his prayer becomes the condition for knowing and acknowledging him.”[126] In other words, knowledge of Christ begins through an entering into Jesus’ act of prayer by the one who acknowledges him: ‘Where there is no relationship with God, he who is profoundly nothing other than a relation to God, to the Father, cannot be truly known or understood.’[127] And what applies to each believer also applies to the Church as a whole. It is only as a community of prayer inscribed in Jesus’ relationship with the Father that the Church is the ‘we’ that acknowledges Christ as he is evoked in Jn 5:18-20 and in 1 Jn 3:11.[128] Again, this is what is at stake in the Christological affirmations of the Symbol: ‘The central affirmation of the dogma, “the Son is consubstantial with the Father, of the same nature as the Fatherˮ, which sums up all the testimony of the ancient councils, simply transposes the fact of Jesus’ prayer into specialised philosophical and theological language, nothing more.’[129] The faith expressed by Nicaea is born of Jesus' relationship with the Father and brings us into it, in order to offer human beings and the Church participation in the knowledge and communion of Jesus with the Father and the Holy Spirit.

2. The event of Wisdom: a new reality for human thought

2.1 Revelation enriches and broadens human thought

80. In proposing the Christological and Trinitarian faith, the Nicene symbol is part of a movement to make human thought fruitful, to ‘broaden reason’,[130] through Revelation in its process of transmission. Indeed, the incomparable access to God provided by the event of Jesus Christ, as well as participation in the thought (phronēsis) and prayer of Christ, cannot but have a decisive impact on human thought and language. We are witnessing an ‘Event of Wisdom’, through which these must be and are enlarged by Revelation so that it can be expressed in them. And in this very movement, they bear witness to the fact that they are capable of being conducted beyond themselves. In the history of this event of Wisdom, Nicaea constitutes a major turning-point, ‘a new and living way’ (Heb 10:20). Pavel Florensky grasped its decisive importance and expressed it in vigorous words:

It is impossible not to shudder to recall that unique moment, forever significant for its philosophical and dogmatic importance, when the thunder of ‘Homoousios’ first rang out over the City of Victory [Nicaea]. It was not a particular question of theology, but a radical definition the Church of Christ gave itself. This term alone not only expressed the Christological dogma, but also provided a spiritual evaluation of the rules of reason. There rationalism was put to death. There, for the first time, the new principle of rational activity was proclaimed urbi et orbi.[131]

The Logos that is Christ incarnate, Son of the Father in the communion of the Holy Spirit, shows that he himself is the measure of all human logos, which he can enliven and expand, but of which he can also be the judge, putting it in crisis (krisis) in the strict sense of the term. Indeed, it is striking to observe how Athanasius, in a lapidary judgement, considers that Arius’ rejection of the fullness of the figure of Christ constitutes a negation of reason, of logos tout court: ‘Denying the Logos of God, they find themselves justly deprived of all logos.’[132] Basically, the event of Wisdom produced by the event of Jesus Christ introduces human reason and thought to their highest and truest vocation. It returns it, so to speak, to itself. Thus, as we shall see, homoousios is not simply an instance of interculturality, but belongs to a prototypical event of wisdom, which is foundational of the Church in her apostolicity.

81. The event of Jesus Christ makes possible a new ontology, with the dimensions of the one and triune God and the incarnate Logos. Human reason had already allowed itself to be opened up and penetrated by the mystery, made accessible by the revelation of creation ex nihilo (2 Ma 7:28; Rom 4:17), of the ontological transcendence of a God who is yet more intimate to each creature than it is to itself.[133] Reason is renewed from top to bottom when it is informed by the profound meaning given to all things by the mystery of the Triune God who is love (1 Jn 4:8,16) – otherness, relation, reciprocity, mutual interiority are henceforth manifested as the ultimate truth and the structuring categories of ontology. Being is illuminated by this, and shows itself to be even richer than it seemed in its earlier philosophical iterations, however profound and complex they may have been. Moreover, Nicaea, which starts from the Christological and soteriological question to set out the God who is Father, Son, and Holy Spirit, is a good reflection of the way in which Christ’s manifestation prompts the inventio of the Trinitarian doctrine through the dynamic between the order of discovery, Christological and pneumatological, placed at its heart, and the order of Trinitarian reality, which structures it. Nicaea accelerated Christian reflection on theo-logy, or exploration of the ‘immanent Trinity’. Since the mystery of Christ, realised in history and in a singular humanity, gives access to God, matter and flesh, time and history, novelty, finitude and fragility themselves are endowed with nobility and with their power to speak of being. In fact, through Revelation, being is also shown to be semper major.

82. The event of Wisdom evidently implies a renewal of anthropology, since the event of Jesus Christ casts a new light on the human being. Let us briefly recall these aspects, which were developed in the first chapter of this document.[134]  The anthropology of the Bible obliges us to revisit the concept of the human being, beginning from the nobility of matter and of singularity. The Creator of Genesis willed each individual, who is ‘engraved on the palms of his hands’ (Is 49:16). Moreover, Jesus calls every human being his brother and sister, because the event of the Incarnation has ennobled every human being, individually, in an unsurpassable and imprescriptible way. When the Nicene-Constantinopolitan symbol declares that Jesus Christ as a true human being is the Son of God, who as such is ‘equal’ to God the Father, all human beings – whatever their origins, nation, talents or training – are attributed a dignity that obliges human intelligence to think in new ways, to go beyond the limits of a merely natural vision of the human being. There is a properly Christological dignity of singular beings.

83. In a similar way to what happens when there is a question of entering into the ‘thought of Christ’, the broadening of ontology and anthropology implies a conversion and can come up against the resistance of a thought that is accustomed to its limits. The event of Wisdom obliges us to take into account not only the ‘analogy of creation’ but also the ‘analogy of charity’. Before the kenosis of the Incarnation and the Passion of Christ, before the suffering and evil that affect humanity, the human spirit stumbles over its limits. The question arises: Why does the Almighty Father seem to have first observed the suffering Son's way of the Cross from on high, and only acted after his death? Why did he not immediately answer the prayer in the Garden of Olives, presented in the sweat of fear: ‘Father, if it is possible, let this cup pass from me...’ (Mt 26:39b)? In fact, the equality of essence with the Father of the incarnate and crucified Son, professed in the Nicene symbol, invites human thought to conversion of itself and to conversion of the meaning of the term ‘omnipotence’. The Triune God is not at first omnipotent and afterwards only loving; rather, his omnipotence is identical to the love manifested in Jesus Christ. Indeed, what Jesus lived, as attested in the New Testament, is – through the action of the Spirit – the revelation in history, on the level of the Trinitarian economy, of the intra-trinitarian relation and reality immanent in God.[135] God is truly God when his omnipotence of love imposes nothing but, rather, gives his covenant partner, human beings, the capacity to bind themselves to him in freedom. God is in harmony with his own being when he does not forcibly convert humanity distorted by sin, but reconciles it to himself through the events of Bethlehem and Golgotha. In all this, our human ways of seeing are called upon to allow themselves to be profoundly transfigured by Christ: ‘Your thoughts are not my thoughts.’ (Is 55:8; see also Mt 16:33)

2.2 A cultural and intercultural event

84. If the event of Jesus Christ renews thought as recreated according to an event of Wisdom, it also renews and purifies, fructifies and broadens human culture. In fact, the Council of Nicaea, which put into words the Christian faith for the Church spread among all nations, in the Greek language and by adopting a term derived from Greek philosophy, undoubtedly constitutes a cultural event. It is necessary for faith assume human culture, just as it assumes human nature, since nature and culture are constitutive of the human being and therefore inseparable. Pope Francis reminds us that ‘the human being is always culturally situated.’[136] Because human beings are relational and social beings who inscribe themselves in history, it is through culture that they reach the fullness of their humanity.[137] Moreover, Revelation, which establishes communion between God and the human being, requires recipients who have the ability accept it in full freedom and responsibility. Hence came the election of the people of the twelve tribes of Israel, who had to distinguish themselves from all the other peoples and painstakingly learn, for their own sake first of all, to separate truth from error. Hence came Jesus Christ, in whom the Son of God became truly human, a Hebrew, a Galilean, whose humanity bears the cultural marks of the historical journey of his people. Hence came the Church, constituted from all nations. Thus, basing himself on the Thomasian principle – ‘grace presupposes nature’ – and extending it, Pope Francis adds: ‘grace presupposes culture, and the gift of God becomes incarnate in the culture of those who receive it.’[138]

85. This assumption of culture by Revelation implies a certain reciprocity of influence between the two, notwithstanding their asymmetry. Just as the human spirit is capable of being transfigured, so culture has a vocation to allow itself to be illuminated by Revelation, to the point of being able to accept, at the price of conversion, the wisdom of the Crucified One: ‘The power of the Gospel [must permeate] modes of thought, criteria of judgement, norms of action; in a word, it is necessary that the whole of human culture be permeated by the Gospel.’[139] Nevertheless, faith is not foreign to the cultures in which it is lived, for since Pentecost the Christian faith has included the certainty that there is not a single human culture that does not await and hope for its fulfilment from the coming of the Word of God, who himself has spread the semina Verbi[140] in all cultures awaiting his visitation. It is in this way that they become fully themselves. It is therefore from within, from their openness to what is true, good, and beautiful, that Revelation purifies and elevates them. But then, the cultures and languages assumed and transfigured by the newness of Revelation make it possible to enrich and clarify the expression of faith. This reciprocity has been seen down the centuries in the fertilisation of language, poetry, and art by the Bible, the understanding of which is itself in turn illuminated by its diffraction into other words and visions of the world. This is also what happens at Nicaea in the use of the term homoousios, which clarifies the Church's understanding of the Sonship of Jesus Christ while transfiguring the term it assumes.

86. In this assumption of culture, a unique and providential place must be reserved for the relationship between Hebrew culture and Greek culture. Homoousios will be seen here as the fruit of a particularly strong synthesis between Semitic culture, already touched and transfigured by Revelation, but also shaped by encounters and disagreements with peoples of other cultures – Egyptians, Canaanites, Mesopotamians, Romans – and the Greek world. For more than three centuries before the birth of Jesus and up until the third century AD, the teaching and intellectual life of Hellenistic Judaism had been expressed not only in Aramaic, but also in Greek, with the Septuagint as its centre of gravity. The teaching of Jesus was recorded and transmitted in Greek, in order to be able to communicate the Gospel to everyone in the universal language of the Mediterranean world, but also because the New Testament is inscribed in the history of the Jewish people’s relationship with Greek culture and language. As in the Septuagint, there are influences in both directions. For example, the panta ta ethnē of Mt 28:19 translates the ancient Jewish idea of all the nations flocking to Jerusalem, and măthētēs (disciples-students) translates the Aramaic talmudim. Conversely, the evangelists use the Greek of the law court to interpret the trial and passion of Jesus, the author of Acts draws on the epic poetry of the Odyssey to narrate Paul’s travels, and Paul often echoes elements of Stoic philosophy, just as certain passages in the New Testament bear traces of a Greek ontological vocabulary.[141] It was quite natural for nascent Christianity to continue this synthesis of Semitic and Greek thought, in dialogue with Judeo-Hellenistic and Greco-Roman authors, in order to interpret the Scriptures and develop its own thought. The richness of the Greek expression of Judaism and Christianity suggests that there was a foundational dimension to this grafting of Greek culture onto Hebrew culture, which made it possible to explain in Greek the uniqueness and universality of salvation in Jesus Christ in the face of philosophical reason.[142] Obviously, a whole section of Christians, particularly outside the borders of the Roman Empire, did not belong to this cultural area, and they deployed their own genius in the service of the expression of faith in the Syriac-speaking world of Armenia and Egypt, but they too took a position in relation to Greek thought, allowing themselves to be both inspired by it and to distance themselves from it.

87. The Council of Nicaea is not simply an event of the assumption and enriching of culture by Revelation, but it is also the occasion for intercultural encounters. And this meeting of cultures is a major aspect of the Wisdom event to which the event of Jesus Christ gives rise, so much so that Revelation connects and brings cultures into communion with each other, making possible the highest possible degree of interculturality. Exchange and mutual fertilisation are already a constitutive part of all cultures, which do not exist apart from the process by which they are in contact with each other, and thus evolve, enrich, and sometimes oppose and endanger each other. However, the renewing power of Revelation brings to these relationships a qualitative leap in intensity. On the one hand, by giving access to the transcendent source of truth and goodness, to the root of the universality of the human spirit that makes their communication possible,[143] it fully opens up common space for their encounters and exchanges. On the other hand, the event of Jesus Christ is a power of conversion and liberation from the forces of confinement and opposition to the other found in the lives of peoples and cultures. It is only a ‘saved’ culture, so to speak, which can surpass itself without losing itself, and open itself to other cultures to be enriched by them as well as to enrich them. Listening to the Word of God and Tradition, and therefore to the word of the Other, accustoms one’s spirit and accustoms cultures, so to speak, to the practice of listening to others.[144] This does not lead to an external and impoverished juxtaposition of cultures, nor to a fusion into an indistinct whole, but to a saved and elevated interculturality in which each culture surpasses itself while being strengthened in its own solidity, by virtue of a form of perichoresis of cultures.[145] This is why we need to take into account both the real newness and the ‘elevation’ of cultures, including the fact that those who accept the Gospel of Christ preserve their cultural identity and are strengthened by it:[146] ‘For Christians are no different from other people in terms of their country, language, or customs [...] And they show forth the character of their own citizenship in a marvelous and admittedly paradoxical way by following local customs in what they wear and what they eat and in the rest of their lives.’[147]

88. Interculturality is in fact the manifestation of a deeper issue, which constitutes its foundation: the divine plan for the unity of peoples and the arduous path of this unity in diversity. This is one of the major threads running through biblical salvation history. The typical story of the Tower of Babel in Gen 11:1-9 underlines the tension between the richness of the multiplicity of languages and cultures, on the one hand, and the capacity of human beings to shatter the unity of the common home, to blur the logos of the oikos. Abraham's call, the promise made that in him ‘all the families of the earth will be blessed’ (Gen 12:3), is God's first salvific response. The prophets extended this promise to the peoples of the world by announcing the unity of all nations around the chosen people and the Law.[148] The New Testament presents this unity as realised in the Messiah, who by his blood and in his flesh ‘destroys the dividing wall, the hostility’ between Israel and the nations, in order to ‘create in himself out of both a new human being’ (Eph 2:14, 15b). In this way, the Gentiles are associated with the people of the Covenant, by being ‘admitted to the same inheritance, members of the same body, associated with the same promise’ (Eph 3:6). This is possible in Christ, the singular universal, who holds together otherness and identity, and who assumes all humanity by assuming a genealogically and culturally situated humanity. The antitype of Babel, the Pentecost of the tongues of fire in Acts 2:1-18, is the manifestation and realisation of this power of communion of the human logos, which ultimately proceeds from the Logos of God.[149] It is not in the fused unity of a single language that the Holy Spirit brings about the communion of these Jews of different languages and cultures, but by inspiring an understanding of the other, an image of what will be the Church that gathers all the nations, all striving towards its fulfilment, when the “144,000 sealed” of the twelve tribes of Israel and ‘the great multitude that no one could number, from every nation, tribe, people and language’ will bring about the full eschatological communion of humanity in the new Jerusalem (Rev 7:4.9).

89. The intercultural dimension of which Nicaea is the founding expression can also be seen as a model for the contemporary period in which the Church is present in a variety of cultural settings: Asian, African, Latin American and Oceanic cultures, new popular European cultures, not to mention the new cultural form carried by the digital revolution and technoscience. All these contemporary cultural universes seem far removed from the ancient Greek culture that was the first to welcome the form of dogmatic inculturation achieved at Nicaea. On the one hand, it must be emphasised that it was in these Greek categories that the Church expressed itself in a normative way, and that they are therefore forever linked to the deposit of faith.[150] On the other hand, however, the Church can draw inspiration from the Nicene Fathers to seek meaningful expressions of the faith in different languages and contexts today, while remaining faithful to the terms of that era and finding her living roots in them. With the grace of the Holy Spirit, Christian communities, their theologians and pastors, in effective communion with the magisterium, must themselves, in their own cultural situations and idioms, carry out a task similar to that of the past in affirming the radical unity of the Son and the Father. Nicaea remains a paradigm for all intercultural encounters and for the possibility of receiving or forging new authentic ways of expressing the apostolic faith.

2.3 The Church's creative fidelity and the problem of heresy

90. The perception of Nicaea as a moment of the event of Wisdom brought about by the event of Jesus Christ allows us to reread with greater finesse the history of the heresies to which the Council responds. Heresy, which intentionally departs from the apostolic witness and mutilates its integrity, is perceived by the Fathers as the novelty that leaves the path of regula fidei and traditio and, by that very fact, departs from the historical reality of Christ. Arius is criticised precisely for introducing something new.[151] However, in view of the novum inaugurated by the event of Jesus Christ, it may be illuminating to understand heresy also as a fundamental resistance, both passive and active, to the supernatural novelty that opens up human thought and cultures beyond themselves – a novelty of grace to which the new language of faith expressed by the homoousios bears witness. It is almost inevitable that human beings, with all their faculties and in all their being, will resist this unheard-of novelty that converts and transfigures them. This is a resistance, and therefore a sin of the ‘old human being’ (Rom 6:6; see also Eph 2:15), coming from the difficulty of fully conceiving and accepting the immensity of God and his love, as well as the immense dignity of the human being. The slow, tentative but prudent path taken by the first attempts to understand the meaning of the mystery of the Crucified One and his glorious resurrection, the passage from the apostolic kerygma to the first steps of what we today call theology, is therefore accompanied by constant tensions and a plurality of opinions that depart from the fullness of the apostolic witness and are designated by the term heterodoxy, as well as that of heresy.

91. Rather than give an exhaustive list of the heresies of the first centuries, let us highlight this resistance to the novum of Revelation through a few examples. Often considered to be the first heresy, the rationalist teaching of the Gnostics trivialised the realism of the mystery of the Incarnation through Docetism and, by reducing sacred history to mythological narratives, denied the completeness of human salvation, which was relegated to the plane of an ethereal spirituality. In his battle against Gnosticism, Irenaeus emphasises that it is a matter of resistance to the idea that God himself is capable and willing to enter history, to unite himself with humanity to the very end, even to the point of becoming truly human and dying. This is a resistance to believing in the beauty of the singular, of matter and of history, also revealed in the event of Jesus Christ and to which the Old and New Testaments bear witness. Subsequently, the Fathers did not hesitate to have recourse to concepts and frameworks of thought derived from Greek philosophy in order to refine Christian thought. In doing so, they were obliged to burst open frameworks of thought that were by themselves incapable of making it possible to conceive that the Logos could become flesh, that the Logos or the Nous (νοῦς) that express the divinity are equal to the source from which they come, or that a multiplicity is possible that does not contradict divine unity and is even good within that unity. The proponents of the Christological and Trinitarian heresies are those who have not succeeded in allowing these frameworks of thought, whatever their richness and real contribution to thinking about Christian doctrine, to be enlarged by the unheard-of immensity of the nous (νοῦς) Christou. The same difficulty can be found in the interplay of Christological currents in the East throughout the third century, which in a sense prepared the way for the Arian heresy. We must avoid caricaturing the varying positions of the protagonists of these currents, for they were above all individual thinkers, but they all struggled with the same difficulties in holding together the Trinitarian richness of the one God and the radicality of the full assumption of a singular humanity by the Son equal to the Father: some faced a Trinitarian theology with a subordinationist tendency and a Christology that risked being Docetist, while others resisted forms of Trinitarian modalism and adoptianism. It is these same forms of resistance from the old ways of thinking that are expressed, a few decades before Nicaea, in the teaching of Arius: it is inconceivable to him that the Son, who is other than the Father, who is born and dies, could be co-eternal and equal to God, without undermining divine unity and transcendence and thus the redemption of humanity.

92. These forms of resistance are quite understandable, given how human this is. They bear witness, as in a negative way, to the incredible light cast on the perception of God and of the divine vocation of the human being by the event of Jesus Christ, and to the no less incredible transfiguration of human thought and culture deployed in the event of Wisdom that follows from it. Nothing human is abolished, but access to the immensity of God’s truth requires God’s own Revelation and the grace that converts and elevates human faculties and achievements. In a sense, the resistance of the heresies allows us to see Nicaea in all its power of immeasurable newness.

3. The ecclesial event: the Council of Nicaea, the first ecumenical council

3.1 The Church enters into the event of Jesus Christ through her nature and structures

93. The Council of Nicaea is not only an event in the history of doctrine, but it could well be understood as an ecclesial event, corresponding to a fundamental stage in the process of structuring the Church. In the course of a long process following Nicaea, the ‘Ecumenical Council’ became the beacon of doctrinal and juridical orientation and decision-making for the whole Church, her place of communion and ultimate authority. Can this be seen, from the point of view of her structure, as a turning-point that orients the further life of the Church, similar to what the Nicene symbol represents from the point of view of access to God (the Jesus Christ event) and human thought (the Wisdom event)? This would be the case if the Ecumenical Council as such could be considered as a specifically ecclesial fruit and expression of the event of Jesus Christ.

94. From her very beginnings, the Church has been aware of being part of the continuity of the chosen people, an assembly called together (qāhāl/ekklēsia cf. Dt 5:22) to live by the revealed Torah and to worship the Lord its God. She too sees herself as ‘a chosen race, a royal priesthood, a holy nation, a people acquired to proclaim the praises’ (1 Pet 2:9) of the God of Israel. In the Acts of the Apostles, she is presented as a community of discerning the will of God, whose principal agent is the Holy Spirit,[152] and which is guided by human beings who continue the role of the twelve apostles, ‘witnesses of the Resurrection’ (Acts 1:22). In a sense, it is in the ecclesial community, as the body of Christ, that we can discern ‘the disposition of Christ’ (Phil 2:5; see § 77 above).

95. This awareness was expressed by the early Fathers, who linked the structure and functioning of the Church to her profound nature and calling. Thus, at the beginning of the second century, Ignatius of Antioch emphasised that the various particular Churches see themselves in solidarity as an expression of the one Church. Its members are synodoi, companions on the journey, where each is called to play his or her part according to the divine order that establishes the harmony expressed by the Eucharistic synaxis. Thus, by her unity and order, the Church sings the praise of God the Father in Christ, striving towards her full unity, which will be realised in the Kingdom of God. Cyprian of Carthage deepened this teaching in the middle of the third century by clarifying the synodal and episcopal foundation on which the life of the Church must rest: nothing is done without the bishop (nihil sine episcopo), but likewise nothing is done without ‘your council’ (that of the priests and deacons) or without the consent of the people (nihil sine consilio vestro et sine consensu plebis).[153] Unity linked to the unity of the Trinity, the inspiration of the Holy Spirit, walking together (synodos) towards the Kingdom, fidelity to the doctrine of the Apostles and to the celebration of the Eucharist, the order and harmony of the ministers and the baptised, with a particular role conferred on the bishops: these elements show that the Church, in her structures and functioning, is deeply inscribed in the event of Jesus Christ as its moment and its privileged expression. In celebrating Nicaea, we are gathering together and celebrating the entire synodal process that preceded and culminated in the Ecumenical Council.

3.2 The structural collaboration of the Church’s charisms and the road to Nicaea

96. These elements proper to the theological nature of the Church, which can only be the fruit of the event of Revelation, were manifested in the historical journey that led to the Ecumenical Council of Nicaea through the interaction of three charisms, applied to government, teaching, and community decision-making in the Church: first the threefold hierarchy, then the teachers and the synod. An order of precedence, in which the apostles come first, seems to be well established in the Pauline corpus: ‘God established in the Church first apostles, second prophets, third teachers...’ (1 Cor 12:28; cf. Eph 4:11). The first characteristic is the progressive development of the threefold hierarchy of bishops, priests and deacons. This hierarchy, which supervised the prophets and itinerant teachers of the first 150 years of Christianity (often called ‘apostles’ in a general sense), came to supplant them to a certain extent, and became the local governing structure of the Church. The figure of the bishop, in particular, expresses the apostolic dimension of the Church. From the fourth century onwards, ecclesiastical provinces were formed, which expressed and promoted communion between the particular Churches, headed by a metropolitan.

97. Since Christians were called upon to proclaim Christ and to transmit his teaching and the teaching of the Apostles to all nations, it is not surprising that the second characteristic of Christianity in the pre-Nicene period was the decisive importance of schools and teachers, who taught catechumens and interpreted the Scriptures. They could be ordained ministers or not. Pelagius, for example, taught in Rome at the beginning of the fifth century even though he was not a priest, as did Melania the Elder and Rufinus in Jerusalem, and Jerome in Bethlehem and then in Rome. Origen himself directed the School of Alexandria after the death of his father Leonidas before being ordained.

98. Finally, after the second half of the second century and at the beginning of the third,,especially in Asia Minor, the synod took on an increasingly important role in deciding important questions of discipline, worship, and teaching. Initially, synods were local, but the sending of synodical letters communicating their decisions (acta) to other Churches, the exchange of delegations and requests for mutual recognition all bear witness to the ‘firm conviction that the decisions taken are an expression of communion with all the Churches’, inasmuch as ‘each local Church is an expression of the one and catholic Church.’[154] It should be noted that the synod had a very clear juridical or canonical dimension as an institution that legislates. The documents and collections of synodal canons were gathered together in episcopal archives, particularly in Rome: the development of canon law and that of the synods go hand in hand and accompany each other. Constantine's legitimisation of the Church cannot be solely attributed to a shift towards an institutionalised, kind of state Church. Perceived as a polis (city) which reflects the City of God, the heavenly Jerusalem (cf. Is 60 and 62; 65:18; Rev 3:12; 21:1-27), or as a synodos in the literal sense of a people taking the same path as Jesus towards the Kingdom, with Jesus at their head as their proestos, or president, the Church is constitutively ‘political’ and institutional.[155]

99. These three charisms evolved differently and in their own way within the Church, but none was separate or set free from the other two. Although tensions naturally arose between and within them, they enriched, informed, and reinforced each other. Teachers often participated as members in synods. Similarly, the bishops were from the outset teachers and preachers according to the model of Ignatius of Antioch. Clearly, the bishops presided over the synods and played a leading role as guardians of orthodoxy in faith and practice. Moreover, in his sacramental role, the bishop presided at the Eucharistic celebration which opened and closed each synod, the source and summit of the ‘walking together’ that is the synodos.[156] The Eucharist was a sign of the reception of the synodal decisions, and of the communion of believers with their bishops, established in apostolic succession within the bosom of the ‘Catholica’, the one and single Church of God, and was a visible manifestation of belonging to the body of Christ and of the mutual belonging of Christians (cf. 1 Cor 12:12).[157]

100. Not only do these elements of the process of structuring the Church show that it is rooted in the Jesus Christ Event, but it is also possible to discern in these processes a certain analogy with what constituted the Wisdom Event, as analysed above. Just as human thought, profoundly renewed by the event of Jesus Christ, takes on and transforms human cultures, notably through the encounter of Semitic thought, already affected from within by Revelation, with Greek culture and other cultures, so the three dimensions or charisms we have identified arose both from Jewish institutions and from local versions of Greco-Roman institutions of the first centuries of our era, both civil and sacred. On the one hand, Second Temple Judaism had its own priestly hierarchy, schools, and synods. On the other hand, as there were no specific schools for them, Christian teachers were almost all trained as orators and interpreters in the enkyklios paideia, or general education system of the Greco-Roman world, and therefore used rhetoric and philosophy, which they helped to inscribe in the heritage of Christian doctrine. The synod (concilium in Latin) was already an ancient institution in the Greco-Roman world when Christians gave it an important place. But these different aspects take on their own dimensions, transfigure, one could say, when they are at the service of the Church’s mission to proclaim the Gospel and to be an effective sign of unity for humankind.

3.3 The Ecumenical Council of Nicaea

101. In 325, a synod was held at Nicaea, which was in part a culmination of this process, but also an exceptional form of it because of its ecumenical scope. Convened by the Emperor to resolve a local dispute that had spread to all the Churches of the Eastern Roman Empire and to many Churches in the West, it brought together bishops from various regions of the East and legates from the Bishop of Rome. For the first time, therefore, bishops from all over the Oikoumenè were gathered in synod. Its profession of faith and canonical decisions were promulgated as normative for the whole Church. The unprecedented communion and unity brought about in the Church by the event of Jesus Christ are made visible and effective in a new way through a structure of universal significance, and the proclamation of the Good News of Christ in all its immensity is also given an instrument of unprecedented authority and scope:

Through the synodal exercise of the bishops’ ministry, the Council of Nicaea was the first institutional expression on the universal level of the ἐξουσία of the Risen Lord who guides and directs the way forward of the People of God in the Holy Spirit. An analogous experience was realised in the successive ecumenical councils of the first millennium, which gave normative shape to the identity of the one Catholic Church.[158]

102. With the Council of Nicaea, the very idea of a synod or ecumenical council became established. Although none of its acta survived, in all probability, and notwithstanding a slow and arduous reception, the proclamation of the homoousios and the statutes of Nicaea endured. After this long process of reception – which would be typical of any council – Nicaea became the ideal of a council in the minds of many. Its traditional presentation as a unified council, inspired by the Holy Spirit, helped it to become the ideal council in later tradition and gradually created esteem for ecumenical councils among Christians. Nicaea opened the way for subsequent ecumenical councils and thus for a new mode of synodality or conciliarity that would mark the life of the Church to this day, both in its role of defining and proclaiming the faith and in the manifestation of the unity of the whole Oikouménè represented within it.


Chapter 4

Keeping the faith accessible for all God's people

Introduction: the Council of Nicaea and the conditions of credibility of the Christian mystery

103. The first and legitimate idea that we retain from the Council of Nicaea is that it was a dogmatic council which defended and clarified the Christological and Trinitarian fides quae. In this final chapter, we explain how the event of the Council also established a certain institutional mechanism of the one and catholic Church for resolving a dogmatic conflict in conditions that would make its decision acceptable. This examination by fundamental theology must therefore complement dogmatic and historical investigation. It is the fides quae, the salvific truth, which engenders adherence to salvation, the fides qua; but at Nicaea the fides qua itself was placed at the service of the acceptance and understanding of the fides quae. Consideration of the processes of the fides qua, that is, the conditions for defining and receiving the fides quae, manifests the nature and role of the Church. Of course, it is clear that the invention of this institutional mechanism was a gradual process, that it did not emerge fully armed like Athena from the head of Zeus, in short that the dogmatic concept of the ‘ecumenical council’ could not have been exactly contemporary with the event of 325. As we explained in Chapter II, the place par excellence where fides qua and fides quae meet is baptism. It is there that the individual is incorporated into the faith of the Church, which he or she receives from mother Church. In this context of baptism and catechesis of initiation, the early Church articulated the rule of faith as the most substantial summary of the faith. Given its relevance, it was used to discern the truth of the faith in the face of heresy (Irenaeus, Tertullian, Origen, for example). It is the precursor of the dogmatic position of the symbol as a summary of the normative elements of the faith. This awareness of a norm (regula; kănōn) is present in the procedure of the pre-Nicene synods which discerned the faith.

104. Based on the many experiences of the regional and local synods of the second and third centuries, it is possible to support the dogmatic thesis that it was a certain ecclesiological truth, judged a priori to be operative, which was called upon to resolve the problem of a Trinitarian, Christological, and soteriological truth threatened with being altered, distorted, or lost. The processes of fides qua manifest the nature of the Church. The Word of God who became flesh (Jn 1:14) truly makes the Father known, and this knowledge, through the power of the Holy Spirit, is entrusted to the Church, which is responsible for guarding and transmitting it. This mission implies that the Church can interpret the Scriptures with authority. This also shows that believing in the Church – as the Symbol professes – and believing in her authority to define Christological and Trinitarian doctrine is founded in the act of faith in Jesus Christ and in the Trinity, in a form of a ‘reciprocal priority’ or ‘reciprocal causality’, according to the happy Thomistic expression.[159] Finally, the ultimate aim of this whole ecclesial procedure should also be a focus of our attention. Our hypothesis is that the conciliar procedure was put at the service of the little ones, at the service even of the faith of children, which is the paradigm of the faith of the true disciple in the eyes of the Lord Jesus, and thus of the proclamation of the Gospel to all. This sheds light on the meaning of the Church’s magisterium, which aims at a protecting charity towards the ‘least’ of Christ's ‘brothers and sisters’ (cf. Mt 25:40).

1. Theology at the service of the integral character of salvific truth

1.1 Christ, the eschatologically effective truth

105. Insofar as Nicaea proposes a truth in questions related to salvation and distinguishes it from error, its first issue from the point of view of fundamental theology is that of the place of truth in soteriology. This conviction stems first of all from the very form of Revelation, which, by allowing itself to be transcribed into written words, shows that the dimension of truth is constitutive of it. The Christian faith presupposes that the truth of Christ is made accessible to his disciples. Indeed, the Saviour himself is the truth: ‘I am the way and the truth and the life.’ (Jn 14:6) In Christianity, truth is a person. Truth is no longer a simple matter of logic or reasoning; it is not possible to have it as a possession, and it cannot be separated from the other attributes identified with the very person of Christ, such as goodness, justice and love. The fact remains that adherence to Christ always calls on the disciples' understanding: ‘Credo ut intelligam.’[160] Indeed, it is neither imaginable nor coherent to think that the God who created human beings intelligent and free – one of the dimensions of creation in the image and likeness of the Creator himself (Gen 1:26-27) – could, as God the Saviour, be indifferent to access to the knowledge of his truth and of the saving truth. Moreover, this saving truth has a communal dimension. Nicaea is a communal act of expressing the truth, in order to communicate it to the whole Church. In fact, it is neither imaginable nor coherent to think that the creator of the human family, and in particular of its capacity for intelligible communication through languages (cf. Gen 11:1-9 – the Tower of Babel, and Acts 2:1-11 – Pentecost), could be indifferent to communal access to his truth and to saving truth. This is why disintegration of the unity of the faith compromises the strength and effectiveness of salvation in Jesus Christ.

106. This constitutive place of truth in salvation reflects on the very nature of the Church as ‘bearer of truth’ (alēthefora). She bears another than herself, Christ the Truth, and would not be herself without this Truth. The Church is by necessity a place of searching for, finding, guarding, and deploying the truth accomplished in the Word for the personal and ecclesial benefit of his disciples and of all human beings. She is also a place of communion with the vivifying power of this truth, which circulates within her, while also as it were irrigating the world’s search for truth, its thought and its culture.[161] The life-giving tradition (transmission) of saving truth itself is therefore one of the most powerful meanings that can be given to the dogmatic concept of ecclesial Tradition.[162]

107. The centrality of truth explains the profound rejection of idolatry in the Scriptures. The Holy One of Israel is a God who speaks, unlike idols. ‘They have mouths and do not speak’, say the Psalms (115:5 and 135:15), echoed in 1 Corinthians 12:2: ‘As you know, when you were pagans, you were irresistibly drawn towards dumb idols.’ Moreover, the truth, power, justice and holiness of God has always been conceived, biblically, in relation to his claim to bring true and universal salvation, whereas idolatrous practices claim to offer only a gift that is partial and regional. Moreover, since this is the person who comes from God and is God and Lord (cf. Jn 13:14), the truth of salvation is something that must be received, whereas idolatry constructs the divine from the human. The fact that God cannot be fashioned like the statue of an idol (see the irony of Wis 13:11-19) brings us back to the notion of divine self-revelation, which stands in stark contrast to the idea of self-realisation so common in religion, even in ancient times, as evidenced by Gnosticism, described by Irenaeus as a heresy and as a ‘lyingly named gnosis’. Gnosticism ‘lies’; it contradicts the very notion of salvific truth, because it is not truth accepted from God and freely received in love. To the contrary, through his incarnation, the Word of God calls upon the ecclesial and personal act of faith as a reception in the Holy Spirit, through the mind and the whole being, of the mysteries that save: ‘You worship him whom you do not know; we worship him whom we do know, because salvation comes from the Jews’ (Jn 4:22). Finally, Jesus is the Word of God, sent into the world on a mission of the word, a word of integral truth that calls for a response of faith from human beings. That is why this is a truly salvific truth, eschatologically effective: ‘Today you will be with me in paradise’ (Lk 23:43). Nicaea’s choice to express in words an integral truth of salvation for all, to be received in faith, is a fidelity not only to Christological truth (fides quae) but also to the personal relationship to the truth that is Christ himself (fides qua).

1.2 Salvation and the process of divine filiation

108. This soteriological truth is to be taken in its strongest, ontological sense. Without claiming to offer an exhaustive understanding that would detract from the mystery of salvation as a mystery, it nevertheless gives access to the very truth of God’s filiation and paternity. The God of truth wanted, so to speak, to put human beings to the test of the unheard-of filial claim of his only Son Jesus. The truth revealed by God is then summed up in the truth of his only ‘Son’. This term cannot be reduced to a simple metaphor or analogy, because what is metaphorical here opens itself to the register of ontology, just as the symbolon, in the strong sense of the term, gives real and effective access to the reality it signifies. The testimony of the Father given to Jesus is the foundation of this truth: ‘If we receive human testimony, the testimony of God is greater, because this is the testimony of God: he has testified to his Son. Those who believe in the Son of God have the testimony in themselves’ (1 Jn 5:9). The author adds: ‘The one who does not believe God makes God a liar’ (1 Jn 5:10). Our old catechisms liked to formulate this intimate conviction of the Christian act of faith with direct simplicity: ‘God who can neither deceive nor be deceived’,[163] in which Thomas Aquinas would have recognised his own formulations.[164] This justifies the ontological option of the Nicene neologism homoousios, which extends and clarifies the biblical and hymnic terminology. The confirmation of the ontological truth of the divine filiation of Jesus is, as we have seen in the first and third chapters, that the relationship of paternity and filiation is mysteriously reversed regarding the divine and the human: human and earthly paternity become a secondary and derivative naming from its prototype, God the Father (see Eph 3:14; Mt 23:9). It is this truth of divine filiation into which believers are invited to enter that underpins the truth of baptismal filiation.[165] To be saved, according to the Gospel of Jesus, consists in entering into the full truth of sonship, which is an insertion into the eternal sonship of Christ.

2. The mediation of the Church and the inversion of the dogmatic order: Trinity, Christology, Pneumatology, Ecclesiology

2.1 The mediations of faith and the ministry of the Church

109. This salvific and efficacious truth is made explicit and communicated at Nicaea by an act of interpretation of the biblical text in terms derived from hymns and from philosophy, and through the exercise of the understanding of faith. Indeed, the whole economy of biblical revelation attests that the force of conviction about Christological truth should certainly not be understood in terms of fundamentalism, for which the meaning of the Scriptures is available only in an immediate way. On the contrary, the interpretative tradition of ecclesial doctrine and the research of theologians show that faith needs many mediations, starting with the first, unique and foundational one, that of the humanity of the only-begotten Son, which he takes from Mary. God arranged that his unheard-of divine truth would come to humanity through the mediation of his incarnate Word: ‘This is my beloved Son, listen to him’ (Mt 3:17; 17:5). In addition, the different literary genres of expression of Revelation that constitute the biblical texts call for different hermeneutical strategies.[166] The Symbol, born of the liturgy and proclaimed in a liturgical setting, bears witness to the fact that interpretative mediation is not reduced to a commentary on the text, but takes place gestis verbisque, where faith is lived out in a community of prayer and grace.[167] We see this in the account in Lk 24, where the Risen Christ himself not only gives an explanation of himself through the exegesis of the Law and the prophets, but also, finally, through his presence and his Eucharistic self-donation, in ‘the breaking of the bread’, as Pope Benedict XVI explained in Verbum Domini:

The Word and the Eucharist are so intimately related to one another that one cannot be understood without the other: the Word of God becomes sacramental flesh in the eucharistic event. The Eucharist opens us up to the understanding of Holy Scripture, just as Holy Scripture in turn illuminates and explains the eucharistic Mystery. Indeed, without recognition of the Lord's real presence in the Eucharist, understanding of Scripture remains incomplete.[168]

110. Thus, the ordering of the mysteries as it is presented in dogmatics can be usefully reversed in fundamental theology. It is through the mystery of the Church, ‘the most difficult mystery to believe in’,[169] that the unheard-of mysteries of the Christian faith are first proposed, mysteries on which the Church herself logically and ontologically depends. In fact, it is primarily the Church's task to establish the credibility of the journey of faith. Obviously, there is ‘an order or “hierarchyˮ of the truths of Catholic doctrine since they vary in their relations to the foundation of the Christian faith.’[170] The Christological, Trinitarian, and soteriological doctrine of the Creed constitutes this foundation. However, within the nexus mysteriorum of the dogmas,[171] the Council’s act of interpretation sheds light on the Church's participation, according to her specific place and role, in the order of salvation.

2.2 Disagreement and synodality

111. The Church's interpretive mediation showed itself in the form of arbitration, particularly in the face of dissension or the need to translate the sacred text. The ‘Council of Jerusalem’ in Acts 15 bears witness for the first time to a disagreement over doctrine (the relationship of Christ’s Gentile disciples to the Mosaic Law) and practice (circumcision, idolatry and fornication), a source of conflict whose resolution, in the form of a restored ecclesial consensus, was first examined by the college of ‘apostles and elders’ (Acts 15:6). A process emerged: first there was a succession of authorised testimonies (Peter, Paul and Barnabas, James), all of which were received in a spirit of mutual listening,[172] then an appeal to the authority of Moses, the institution of mandated messengers to deal with messengers ‘without a mandate’ (Acts 15:24), and finally the drafting of a prescriptive document to be officially presented to the assembly at Antioch (Acts 15:30-31), which met on the initiative of these mandated messengers. Everyone was involved, because the question was submitted to the whole Church of Jerusalem (Acts 15:12), which was present during the ecclesial discernment process and was involved in the final decision (Acts 15:22).[173] The sign of this communal aspect is that the messengers were sent in pairs (Acts 15:27). What is essential for our reflection is that the Church, assisted by the Holy Spirit and functioning synodically, relying on the sensus fidei fidelium[174] and on the particular authority of the apostles, constitutes the living and active mystery in which the doctrinal development regarding the distinction between the disciples of Christ from the Jewish people and those from the Gentiles in regard to the practice of the Mosaic Law was worked out. The arbitration of faith that concerned God’s universal purpose, the entry of the nations into the mystery first revealed to Israel, took place here, in the exchange between fides qua and fides quae, within the dynamic mystery of the Church.

112. From the time before the incarnation of the Word, the Chosen People had had to deal with a similar problem of the preservation, but above all the diffusion, of Revelation in the diaspora of Israel and, beyond that, among the groups of pagan origin which the New Testament calls the ‘proselytes’ (Mt 23:15 and Acts 2:10 and 6:15), and the ‘God-fearers’ (Acts 10:2). It was this fundamental choice, the real origin of which is lost in legend (Epistle of Aristaeus or Talmud-Soferim 1:7), which authorised the translation of the Bible of the Jewish people from Hebrew into Greek, leading to the Alexandrian version of the Septuagint. These translations, like the later use of the neologism homoousios, involved a great deal of lexical arbitration to ensure that the truths of the original text, conceived in the semantic field of a Semitic language, were not lost when the text was transferred to the semantic field of an Indo-European language.

113. These arbitrations express the very nature of the Church and make it possible to grasp the meaning of the magisterium she exercises. For the Church is a reality of grace inscribed in history. She is constituted and moved by the Holy Spirit, the same Spirit who brought about the Incarnation of the Word and who continues to bring about the incorporation of believers into the Mystical Body confronted by the joys, temptations, and vicissitudes of history. Her mission of salvation is carried out not only through preaching, the teaching of the Scriptures and the celebration of the sacraments, but also through the magisterium exercised by the bishops, the successors of the apostles, in communion with the Bishop of Rome, the successor of Peter. This is not to say that the truth of the faith is historical and changeable: rather, it is to say that the recognition of truth and the deepening of its understanding constitute a historical task for the unique Subject of the Church. The Church does not, therefore, dispose of the truth as though it were her possession: truth cannot be manufactured, since it is fundamentally Christ himself who is at stake. Rather she receives truth, recalls it, and interprets it. For each generation, believing with the Church means participating in her unceasing efforts to achieve a deeper and fuller understanding of the faith. The obligation of fidelity cannot be reduced simply to passive docility: it is an obligation of active appropriation for all disciples, with the support and under the vigilance of the living magisterium of the college of bishops. The bishops, when they are in agreement, have the authority to decide in a binding way whether or not a theological interpretation is faithful to the source – Christ and the Apostolic Tradition. The magisterium adds nothing to the Revelation accomplished in Christ and attested by the Scriptures, apart from clarifications of dogmatic development, because the Church exercises her role as authentic interpreter of the Word of God in acts of creative fidelity to Revelation:[175] ‘Thus the judgement concerning the authenticity of the sensus fidelium belongs in the last analysis, not to the faithful themselves nor to theology, but to the magisterium.’[176] What is termed the ordinary magisterium of the successors of the apostles consists of habitual teaching, which continually gives expression to tradition – already referred to in the New Testament as ‘sound doctrine’ (2 Tim 4:3). By comparison, the extraordinary magisterium is exercised rarely, but is so when a decision of doctrinal significance concerning the whole Church has to be taken, particularly in the face of a challenge from some part of the Church. This is what happened in an eminent and explicit manner at the Ecumenical Council of Nicaea.

2.3 The tongues of the Holy Spirit for forming and renewing consensus

114. Basically, then, the ecclesial task was first and foremost a pneumatological task of metaphrase. It operates in the register of translation, as in the Septuagint and the Targumim, which seek fidelity to the Hebrew text by situating themselves resolutely in the modes of thought and genius proper to Greek and Aramaic. We can assume that the same process was at work in the translation of the words of Jesus, spoken in Aramaic, into the Greek of the Gospels. It was also at work in the exegesis of the sacred text, beginning with the midrashim and the writings of the early Fathers of the Church. It is this twofold movement that blossomed in the lively exchanges of an ecumenical council celebrated under the movement of the Spirit of Pentecost, where the speakers could come from the Syriac, Greek, Coptic, or Latin world, and which led to definitions that were themselves translatable into other languages and forms of expression. We witness a twofold boldness of the Holy Spirit. First, a strengthening of the understanding of the faith professed at Nicaea on the part of those who proclaim it with parrēsia and effectiveness for the benefit of the people of God in the different contexts of the world; secondly, boldness in the Holy Spirit on the part of those who listen (auditus fidei) and receive (obsequium fidei) this proclamation.[177] This movement manifests both the nature of the Church and the identity of the Spirit of truth, who ‘recalls’ the words of Christ and guides towards the ‘whole truth’ (Jn 14:26; 16:13). There is nothing surprising in the fact that such an ecclesiological task, which assumes the action of the third divine person, had to go back from salvation history to the original mystery of Trinitarian relations, from the economy to divine ontology.

115. In this task of pneumatological metaphrase, which introduces a new concept unknown to Sacred Scripture, the famous homoousios, it is essential to note that the biblical narratives as well as the metaphors of the scriptural texts are not abolished or obscured by the speculative transcriptions which summarise and clarify their substance. Dogmatic clarification is only of value if it retains the roots that give it life in the humus of the Bible and in the liturgical communion of faith. This is clearly the case in the text of the Creed. In circumstances such as those of the Arian crisis, where the Word of God seems to provide ambivalent support for the preservation of the truth of faith (Lk 18:19: ‘Why say that I am good? No one is good but God alone’), it became necessary for speculative expression to settle the exegetical dispute. However, doctrinal development, with the specific resource of neologisms, must be content to unpack the truths immanent in the language of revelation, in the way that Christ himself explains his parable of the sower in Mt 13:3-9 and then in 18-23. In this sense, it is worth noting that in the history of the Church, dogmatic neologisms have been few and far between, and that they corresponded to truly decisive knots in the Christian mystery: these include ‘consubstantiality’ and ‘hypostatic union’ in Christology; and in the Trinitarian domain, ‘subsistent relations’ and ‘perichoresis’; but also ‘person’ (prosôpon and hypostasis) in its specifically Christian sense, in Trinitarian theology, Christology, and anthropology.

3. Safeguarding the deposit of faith: charity at the service of the littlest

3.1 The unanimous faith of the People of God offered to all

116. The Symbol of Faith and the canons adopted by the Council of Nicaea are not simply ecclesial acts of interpretation, translation and metaphrase, but they also aim to ‘guard’ or ‘watch over’ (phȳlaxein) the deposit of faith handed down by the Apostles (1 Tim 6:20).  Now this protection operates in particular for the benefit of those most at risk. Just as, on the level of fides quae, homoousios is the principle and foundation of the koinonia in Christ of all human beings among themselves, down to the smallest, so, on that of fides qua, the Council’s decision to define a common profession of faith protects all disciples. Doctrinal clarity makes the faith capable of resisting the forces of absolutised cultural regionalism and geopolitical fracture, as well as those of heresy, which is often linked to a form of elitist subtlety.

117. Let us insist on this last aspect. In the fourth century, at a time of the ‘peace of the Church’, when there was a risk that Christian conviction would become weaker as it spread throughout the world, the supporters of ancient paganism were trying to restore its lost vigour by emphasising the accessibility to ordinary mortals of the gods in its pantheon, its practices, and the customs of their ancestors. But the faith preached by Jesus to simple people is not a simplistic faith. The parables and other sayings, or certain Johannine declarations such as the magisterial ‘The Father and I are one’ (Jn 10:30), bear witness to the fact that access to the mystery of God is at least paradoxical. Neither what dogma would come to call the Trinity, nor the hypostatic union enunciated at the Council of Chalcedon, nor the dynamic dyothelitism safeguarded by the soteriology of Maximus the Confessor, could pass for simple propositions. However, Christianity has never considered itself to be an esotericism reserved for an elite of initiates. Christ affirmed this in a fundamental statement: ‘I have spoken openly to the world; I have always taught in the synagogue and in the temple, where all the Jews assemble, and I have said nothing in secret. Why do you question me? Ask those who have heard me about what I have told them; behold, they know what I have said’ (Jn 18:20). Even the mystagogical discipline of the arcane during a period of early Christianity did not indicate a jealous preoccupation with secrecy, but rather a recognition of the seriousness and stages of Christian initiation. And as the centuries have passed, it seems that the Christian faith has fully embraced its decidedly exoteric and popular style. Basically, any Christian, by tracing the sign of the cross on himself or herself, expresses the heart of the Trinitarian and Paschal faith in a fitting and full way.[178] The entire people of God must give a reason for its faith and hope (cf. 1 Pet 3:5): in this sense, it is a theologian.[179]

118. In the same sense, the exercise of the Magisterium, as realised at the Council of Nicaea, and which gives the teaching of the ‘Catholic’ Church an authentically public and institutional style, thereby establishes the equality of all with regard to the content of the faith. The liturgical creed, practised by all the members of the Mystical Body, within a public and common liturgy, will form a touchstone for the contesseratio (the bond of hospitality) of ecclesial communion, dear to Tertullian.[180] The common good of Revelation is truly placed ‘at the disposal’ of all the faithful, as confirmed by the Catholic doctrine of the infallibility in credendo of the people of the baptised: ‘The community of the faithful, anointed by the Holy One (cf. 1 Jn 2:20, 27), cannot err in matters of faith.’[181] The bishops have a specific role in defining the faith, but they cannot assume that role without being part of the ecclesial communion of the whole People of God.[182] In this sense, the New Law in the New Testament puts on the characteristics of the Old Law, whose public dimension is not usually appreciated enough: the law is known by all as a divine law because it is solemnly promulgated. Thus, even leaders are bound by the public character of the Law to its observance. ‘Acceptance of persons’, which is often identified and denounced in the Torah, is more easily seen in an objective way as a violation of the equal dignity of God’s children (cf. Lev 19:5; Deut 10:17; Acts 10:34; Rom 2:11).

3.2 Protecting faith before political power

119. Thus, the Council of Nicaea, with all that it owes to the initiative of the Emperor Constantine, nevertheless represented a milestone on the long road towards libertas Ecclesiae, which is everywhere a guarantee of protection for the faith of the simple and the most vulnerable in the face of political power. At the same time, there was undoubtedly a competing movement towards what would become known as ‘Caesaropapism’, a persistent temptation among the Christian Churches. So should we see in this Council the beginnings of an ecclesial guarantee for the freedom of conscience of the little ones, or the beginnings of a political instrumentalization of the religion of Christ? It is true that the political preoccupations of the Emperor Constantine are often emphasised today; it is pointed out that the Council of Nicaea was intended, among other things, to celebrate the twentieth anniversary of his reign, and it is even insinuated, in some cases, that the profession of faith adopted by Nicaea was intended above all to restore concord within the Empire. Similarly, the notion of heresy is criticised for being associated with the repressive power of the confessional state. Without being able to go into a full treatment of these complex issues within the limits of this document, we can nevertheless distinguish here between forms of unity and objectives, unity of faith among Christians and unity of citizens. On the one hand, Nicaea’s Trinitarian monotheism in its dogmatic truth rightly did not allow honour to, along with Arianism, the Basileus’ claim to be the state and religious symbol of Roman unity and to lay the foundations of a theological-political order stricto sensu.[183] On the other hand, without the magisterial vigilance of the apostolic Church, assisted by the Holy Spirit, in the face of that resistance to the unheard-of nature of Revelation which is heresy, the mysteries of the faith communicated by the self-revelation of the Incarnate Word, crucified and risen, would not have resisted the explosion and cacophony that followed.

120. The protection of the faith of all, as well as the importance of listening to the voice even of the last and least listened to, can be seen in the fact that Nicaea did not follow the path of Arianism. Indeed, Saint Jerome emphasises the numerical majority of Arians and the equally large majority of Arian bishops. Historically, Jerome’s reading probably needs to be nuanced, because the majority of bishops and Christians did not opt directly for Arianism, but were rather hesitant in the face of a terminology that was not found in the New Testament. That said, with an effect of force initiated by the political authorities, the Council was able to safeguard the sensus fidelium[184] which dwelt in the people of God. In this sense, it can be said that the Nicene profession of faith is a faithful echo lived in the Church out of Christ's exultation: ‘I praise you Father, Lord of heaven and earth, for hiding this from the wise and understanding and revealing it to babes. Yes, Father, for such was your gracious will’ (Mt 11:25-26).


Conclusion: Proclaiming Jesus our Salvation to everyone today

121. The celebration of the 1,700th anniversary of the Council of Nicaea is a pressing invitation to the Church to rediscover the treasure entrusted to her and to draw from it so as to share it with joy, with a new impetus, indeed in a ‘new stage of evangelisation’.[185] To proclaim Jesus our Salvation on the basis of the faith expressed at Nicaea, as professed in the Nicene-Constantinople symbol, is first of all to allow ourselves to be amazed by the immensity of Christ, so that all may be amazed, to rekindle the fire of our love for the Lord Jesus, so that all may burn with love for him. Nothing and no one is more beautiful, more life-giving, more necessary than he is. Dostoyevsky declared it forcefully: ‘I have forged within myself a Creed, in which everything appears to me clear and sacred. This Credo is very simple: to believe that there is nothing more beautiful, more profound, more attractive, more reasonable, more virile and more perfect than Christ.’[186] In Jesus, homoousios with the Father, God himself comes to save us; God himself has bound himself to humanity for ever, in order to fulfil our vocation to be human. As the Only-Begotten Son, he conforms us to himself as beloved sons and daughters of the Father through the life-giving power of the Holy Spirit. Those who have seen the glory (doxă) of Christ can express it in song, and let the doxology become a generous and fraternal proclamation, that is to say, a kerygma.

122. To proclaim Jesus our salvation on the basis of the faith expressed at Nicaea does not ignore the reality of humanity. It does not turn away from the sufferings and upheavals that plague the world and today seem to undermine all hope. On the contrary, it confronts these troubles by professing the only possible redemption, won by the one who experienced the violence of sin and rejection, the loneliness of abandonment and death, and who, from the very abyss of evil, rose to bring us too in his victory to the glory of the resurrection. This renewed proclamation does not ignore culture and cultures either, but on the contrary, here too with hope and charity listens to them and is enriched by them, invites them to purification and raises them up. Entering into such a hope obviously requires conversion, but first and foremost on the part of those who proclaim Jesus through their life and words, because conversion is a renewal of the mind according to the thought of Christ. Nicaea is the fruit of a transformation of thought that is both implied and made possible by the event of Jesus Christ. In the same way, a new stage of evangelisation will only be possible for those who allow themselves to be renewed by this event, by those who allow themselves to be seized by the glory of Christ, who is always new.

123. To proclaim Jesus our Salvation on the basis of the faith expressed at Nicaea is to be particularly attentive to the smallest and most vulnerable of our brothers and sisters. The new light shed on the fraternity between all the members of the human family by Christ, the homoousios Son of the Father who shares our common human nature, enlightens in particular those who are most in need of the hope of grace. We are linked by an indestructible radical bond to all those who suffer and are excluded; we are all called to work so that salvation can reach them in particular. To proclaim means here ‘to give food’, ‘to give drink’, ‘to welcome’, ‘to clothe’ and ‘to go and visit’ (Mt 25:34-40), to radiate the humble glory of faith, hope and charity for the one who is not believed, in whom no one hopes and who is unloved by the world. To proclaim means to make these theological virtues shine through humiliation and suffering: this can only come from Christ our Saviour and therefore bear witness to him and enable us to meet him. But let us make no mistake: these crucified people of history are Christ among us, in the strongest possible sense: ‘you did it to me’ (Mt 25:40). The Crucified and Risen One knows their sufferings intimately, and they know his. So they are the apostles, the teachers and the evangelisers of the rich and the healthy. It is a question of helping the poor, but above all of entering into a relationship with them and living with them so as to be taught by them: they understand better than anyone else the immensity of the gift of the homoousios Son, who goes all the way to the Cross, as professed at Nicaea. They can introduce us to the hope that is stronger than death, following the Word of God who descended to the lowest place among us in order to raise us to the highest with him.[187]

124 To proclaim Jesus as our salvation on the basis of the faith expressed at Nicaea is to proclaim him in the Church. It means proclaiming him through the witness of the unprecedented fraternity founded in Christ. It means making known the marvels by which the ‘one, holy, catholic and apostolic’ Church is the ‘universal sacrament of salvation’ and gives access to new life: the treasure of the Scriptures that the Creed interprets, the richness of the prayer, liturgy and sacraments that flow from the baptism professed at Nicaea, the light of the magisterium that is at the service of the faith we share. This treasure, however, ‘we carry in earthen vessels’ (2 Cor 4:7). This is right, because the proclamation will be fruitful only if there is harmony between the form of the message and its content, between the form of Christ and the form of evangelisation. In today’s world, it is particularly important to bear in mind that the glory we have contemplated is that of Christ, ‘meek and humble of heart’ (Mt 11:29), who proclaimed: ‘Blessed are the meek, for they shall inherit the earth.’ (Mt 5:5) The Crucified and Risen One is truly victorious, but it is a victory over death and sin, not over adversaries – there are no losers in the Paschal Mystery, apart from the eschatological loser, Satan the divider.[188] The proclamation of Jesus our Salvation is not a battle, but rather a conformation to Christ, who looked upon those he met with love and compassion (Mk 10:21; Mt 9:36) and allowed himself to be guided by another, by the Spirit of the Father.[189]

The proclamation will be fruitful if it is Christ who acts in us: ‘It is good to remember that in sending his disciples on mission, ‘the Lord acted with them’ (Mk 16:20). He is there, working, striving and doing good with us. In a mysterious way, it is his love that manifests itself through our service, it is he who speaks to the world in this language that sometimes has no words.[190]

 


[1] Francis, Bull of Indiction for the Ordinary Jubilee of 2025, Spes non confundit, n° 17.

[2] Ephrem of Nisibe, Hymns on the Nativity, III, 3, ed. and trans. by E. Beck, Secrétariat du CorpusSCO, Louvain 1959 (CSCO 186 / Script. Syr. 82, p. 21; CSCO 187 / Script. Syr. 83, pp. 18-19, modified trans.); Eng. trans. by J. Meyendorff (Paulist Press, New York – Mahwah 1989, p. 83).

[3] Francis, Address to the Members of the International Theological Commission, 30 November 2023.

[4] Constantine, Letter to the Bishops: «Since at first it had been agreed that a synod of bishops should take place at Ancyra of Galatia, it has now appeared to us, for many [reasons], that it is better that it should gather in the city of Nicaea, in Bithynia: both on account of those bishops coming from Italy and the other regions of Europe, and on account of the good climate, and because I shall be in a proximate way an observer of and a participant in the things that are going to take place» (Athanasius Werke, III/1, 1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1934, pp. 41-42 = Urkunde 20; Eng. trans.: Fontes Nicaenae Synodi. The Contemporary Sources for the Study of the Council of Nicaea (304-337), ed. and trans. by S. Fernández, Contexts of Ancient and Medieval Anthropology 10, Brill-Schöningh, Paderborn 2024, p. 129).

[5] See Council of Chalcedon, preamble (DH, 300).

[6] See Council of Ephesus, 6th session of the Cyrillians (DH, 265).

[7] Quoted in K. Schatz, Allgemeine Konzilien – Brennpunkte der Kirchengeschichte, Brill-Schöningh, Paderborn 2008, p. 41.

[8] Pontifical Council for Promoting Christian Unity, The Greek and the Latin Traditions Regarding the Procession of the Holy Spirit: «The Catholic Church acknowledges the conciliar, ecumenical, normative and irrevocable value, as expression of the one common faith of the Church and of all Christians, of the Symbol professed in Greek at Constantinople in 381 by the Second Ecumenical Council. No profession of faith peculiar to a particular liturgical tradition can contradict this expression of the faith taught and professed by the undivided Church» (Eng. trans. from: L’Osservatore Romano, 13 September 1995). 

[9] Francis, Address to the Dicastery for the Doctrine of the Faith, 26 January 2024.

[10] We follow the Greek version of the Nicene-Constantinopolitan symbol, unless otherwise specified.

[11] The theme of God the Father as creator is very present in the early Fathers of the Church. Clement of Rome says «Father and creator of the entire world» (To the Corinthians, 19, 2 and 35, 3: ed. by A. Jaubert, SCh 167, Cerf, Paris 1971, pp. 133 and 157; Eng. trans. by B.D. Ehrman, LCL 24, Harvard University Press, Cambridge [MA.] 2003, pp. 71 and 97); Justin of Nablus speaks of the «Father of all and Lord God» (Apology on behalf of Christians, 12, 9; 61, 3: ed. by Ch. Munier, SCh 507, Cerf, Paris 2006, pp. 156 and 288-290; Eng. trans. by D. Minnis - P. Parvis, Oxford Early Christian Texts, Oxford University Press, Oxford 2009, pp. 107 and 239); Tatian the Syrian also speaks of the «Constructor of spirits» and the «Father of the things perceptible and visible» (To the Greeks, IV, 3: ed. by M. Marcovich, PTS 43, De Gruyter, Berlin-New York 1995, p. 12; Eng. trans. by M. Whittaker, Oxford Early Christian Texts, Clarendon Press, Oxford 1982, p. 9). Plato considers God to be «the author and father of the whole universe» (Timaeus, 28c; 41a: Eng. trans. by R.G. Bury, LCL 234, Harvard University Press, Cambridge [MA.] 1929, pp. 30 and 40-41; see also Epictetus, Discourses I, 9, 7: Eng. trans. by W.A. Oldfather, LCL 131, Harvard University Press, Cambridge [MA.] 1925, p. 64).

[12] Contrary to Aeschylus, who speaks of the ‘τῶν θεῶν φθόνος’, ‘gods’ high jealousy’ (The Persians, v. 362: ed. by M.L. West, Teubner, Stuttgart 1991, p. 21; Eng. trans. by P. Burian - A. Shapiro, Oxford University Press, Oxford 2009, p. 51), see Thomas Aquinas, Summa contra Gentiles, I, chp. 89, n. 12: Invidiam igitur in Deo impossibile est esse, etiam secundum suae speciei rationem: non solum quia invidia species tristitiae est, sed etiam quia tristatur de bono alterius, et sic accipit bonum alterius tanquam malum sibi.

[13] Hilary of Poitiers, On the Trinity, IX, 61 (ed. by P. Smulders, CCSL 62A, Brepols, Turnhout 1980, pp. 440-441; Eng. trans. by S. McKenna, The Catholic University of America Press, Washington, D.C. 1954, pp. 383-384).

[14] See Hippolytus, Against Noetus 10, 1-2 (ed. and Eng. trans. by R. Butterworth, Heythrop, London 1977, pp. 68-69). Tertullian, Against Praxeas, 5, 2: Ante omnia enim Deus erat solus, ipse sibi et mundus et locus et omnia. Solus autem quia nihil aliud extrinsecus praeter illum. Ceterum ne tunc quidem solus; habebat enim secum quam habebat in semetipso, rationem suam (ed. by A. Kroymann - E. Evans, CCSL 2, Brepols, Turnhout 1954, p. 1163; Eng. trans. by P. Holmes, Lighthouse Publishing, Savage 2018, p. 13).

[15] See the Martyrdom of Saint Polycarp (ed. by P. Th. Camelot, SCh 10, Cerf, Paris 1958, pp. 241-275); Justin, Apology on behalf of Christians, 63 (ed. by Ch. Munier, pp. 294-301; Eng. trans. by D. Minnis - P. Parvis, pp. 245-249).

[16] See the anathema directed against Arius at the end of the Nicene symbol (DH, 126).

[17] Arius, Letter to Eusebius of Nicomedia, 5 (Athanasius Werke, III/1, 1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1934, p. 3 = Urkunde 1; Eng. trans. from: Fontes Nicaenae Synodi, p. 41).

[18] In a reading post-Nicaea, Chromatius of Aquileia affirms: ‘Just as the work of our first creation was the work of the Trinity, so our second creation is the work of the Trinity: the Father does nothing without the Son or without the Holy Spirit, for what is the work of the Father is also the work of the Son, and what is the work of the Son is also the work of the Holy Spirit.’ (Chromatius of Aquileia, Sermons, 18, 4: ed. by J. Lemarié, SCh 164, Cerf, Paris 1971, p. 14).

[19] On these ‘omissions’ of the Holy Spirit, see Y. Congar, I believe in The Holy Spirit, vol. I, The Crossroad Publishing Company, New York 1997, pp. 159-166. Congar’s analyses deal mainly with the 19th and 20th centuries, but the phenomena he describes still exist in a more subtle way.

[20] Pater [...] fons ergo ipse et origo est totius divinitatis, 6th Council of Toledo (DH, 490). See also Augustine, for whom the Father is ‘the beginning of the whole divinity’ (Augustine, De Trinitate, IV, xx, 29: ed. by W.J. Mountain, CCSL 50, Brepols, Turnhout 1968, p. 200; Eng. trans. by Ph. Schaff - A. West Haddan, Christian Literature Publishing, Buffalo 1987, p. 85).

[21] Version of the Nicene symbol (325).

[22] Hilary of Poitiers, On the Trinity, VIII, 41: ‘Nor is he a God of another nature, but the Father and the Son are one’ (ed. by P. Smulders, p. 354; Eng. trans. by S. McKenna, p. 308).

[23] See B. Sesboüé, Histoire des Dogmes. Le Dieu du Salut, vol. I, Desclée, Paris 1994, p. 246.

[24] Latin version of the Nicene-Constantinopolitan symbol, based on the version translated by Rusticus in the 6th century (cf. I. Ortiz de Urbina, Storia dei Concili Ecumenici, vol. I, LEV, Città del Vaticano 1994, p. 172).

[25] See Ephrem and Gregory Palamas, but also Ambrose: Splendor paternae gloriae as a commentary on lumen de lumine, in Ambrosius, Opere poetiche e frammenti, It. trans. by G. Banterle - G. Biffi - I. Biffi - L. Migliavacca, Opera Omnia di Sant’Ambrogio 22, Biblioteca Ambrosiana - Città Nuova, Milano-Roma 1994, pp. 34-37.

[26] ‘The doctrine of the Trinity is not an addition and a weakening but a radicalisation of Christian monotheism’ (K. Rahner, Unicité et Trinité de Dieu en dialogue avec l’islam [1978], in Œuvres. 22/1b: Dogmatique après le Concile. Fondement de la théologie, doctrine de Dieu et christologie, Cerf, Paris 2022, p. 213).

[27] See M. Wyschogrod, Abraham’s Promise, Judaism and Jewish-Christian Relations, SCM Press, London 2006, p. 178.

[28] Cf. D. Boyarin, Le Christ Juif, Cerf, Paris 2019, pp. 42-66; P. Lenhardt, L’Unité de la Trinité. À l’écoute de la tradition d’Israël, Parole et Silence, Paris 2011; P. Schäfer, Two Gods in Heaven: Jewish Concepts of God in Antiquity, Princeton University Press, Princeton (N.J.) 2020.

[29] See D. Boyarin, Le Christ Juif, p. 55-56, for example. This position is actually considered in the Jewish world as a possible interpretation of Daniel in the Aramaic text and of various texts from the Second Temple period, although it is also much debated.

[30] Pr 1,9.14; 8,1-36; Wis 1,7; 7,22-27; Si 24,1-22. Some exegetes also use the expression ‘duotheism’ with regard to personified Wisdom, see J. Trublet (ed.), La Sagesse Biblique. De l’Ancien au Nouveau Testament, Lectio Divina 160, Cerf, Paris 1995.

[31] See L. W. Hurtado, One God, one Lord. Early Christian Devotion and Ancient Jewish Monotheism, T&T Clark, Edinburgh 1998; R. Bauckham, God Crucified (1996), in Id., Jesus and the God of Israel, Paternoster, Crownhill (U.K.) 2008, pp. 1-59. For example, part of the Nicene symbol was formulated in the first early Judeo-Christian literature, the Odes of Solomon, which date from around 70-125 AD, see Ode 14:12-17, in A. Rahlfs - R. Hanhart (ed.), Septuaginta, SESB Edition, Stuttgart 2006.

[32] The Latin version of the Creed distinguishes between the fact that Christ took flesh ‘through’ (de) the Holy Spirit and ‘through’ (ex) the Virgin Mary.

[33]J. Ratzinger, Einführung in das Christentum, Vorlesungen über das Apostolische Glaubensbekenntnis, Vorwort zur Neuausgabe, in JRGS 4 (2000), p. 52.

[34] Ecumenical Council of Chalcedon: ‘Following the holy fathers, then, we all unanimously teach that we confess one and the same Son, our Lord Jesus Christ, the same perfect in divinity, and the same perfect in humanity, the same truly God and truly human (composed of) a rational soul and a body, consubstantial with the Father as to divinity and the same consubstantial with us as to humanity, in all things like us except sin, before the ages begotten from the Father as to divinity, and in the last days the same (begotten) for us and our salvation as to humanity from the Virgin Mary, Mother of God’ (DH, 301).

[35] Athanasius of Alexandria, Discourses against the Arians, II, 70: ‘The human being, constituted as a creature, would not have been divinised if the Son had not been the true God; and the human being would not have been able to stand in the presence of the Father if the one who had put on the body had not been by nature his true Word. Similarly, we would not have been freed from sin and the curse, if the flesh put on by the Word had not been human flesh (because we would have nothing in common with all that is foreign to us)’ (Athanasius Werke, I/1, 1, ed. by K. Metzler - K. Savvidis, De Gruyter, Berlin-New York 1998, p. 247).

[36] Ibid., III, 7, 3 (Athanasius Werke, I/1, 3, ed. by K. Metzler - K. Savvidis, De Gruyter, Berlin-New York 2000, p. 313).

[37] This expression is found in the Fathers, where other agents in history are sometimes also mentioned along with Pilate, such as ‘the tetrarch Herod’ (Ignatius of Antioch, Letter to the Smyrnaeans, I, 2: ed. by E. Prinzivalli - M. Simonetti, Fondazione Lorenzo Valla - Mondadori, Milano 2010, p. 407; Eng. trans. by B.D. Ehrman, Harvard University Press, Cambridge [MA.] 2003, p. 297) or ‘Tiberius Caesar’ (Justin, Apology on behalf of Christians 13, 3: ed. by Ch. Munier, p. 164; Eng. trans. by D. Minnis - P. Parvis, p. 111).

[38] John Paul II, Meeting with representatives of the Jewish community of Mainz, 17 November 1980, no. 3: ‘The Old Covenant, a Covenant that has never been denounced by God’; Catechism of the Catholic Church, 1992, no. 121: ‘The Old Covenant has never been revoked’. See also Francis, Evangelii Gaudium, 2013, IV, no. 247.

[39] Second Vatican Ecumenical Council, Declaration Nostra Aetate, no. 4.

[40] Irenaeus of Lyon, Against the Heresies IV, 34, 3: ‘How could the Prophets predict the King’s coming; how could they tell in advance about the good news of the liberty he would give; how could they announce beforehand all that was done by Christ, both by words and by deeds, and his passion; how could they foretell the new covenant, if they had received prophetic inspiration from some other god, and had been ignorant, according to you, of the ineffable Father, of his kingdom, and of his dispensations, which God’s Son fulfilled by coming on earth in the last days?’ (ed. by A. Rousseau, SCh 100, Cerf, Paris 1965, pp. 850-853). See A. De Halleux, La profession de l’Esprit-Saint dans le Symbole de Constantinople, in Revue théologique de Louvain 10/1 (1979), pp. 5-39. A symbol of Epiphanius of Salamis dating from 374 develops this theme further: ‘We believe in the Holy Spirit, who spoke in the Law and preached through the prophets, who came down at the Jordan, speaks in the apostles and dwells in the saints’ (DH, 44).

[41] John II, Letter Olim quidem, March 534 (DH, 401). See also Second Council of Constantinople, anathema 10: ‘If anyone does not confess that our Lord Jesus Christ, who was crucified in the flesh, is the true God and Lord of glory and one of the members of the Holy Trinity, let him be anathema’ (DH, 432).

[42] ‘What has already been accomplished in Christ must still be accomplished in us and in the world. The final fulfilment will come at the end, with the resurrection of the dead, the new heavens and the new earth. The Jewish messianic expectation is not in vain. It can become a powerful stimulus for us Christians to keep alive the eschatological dimension of our faith. Like them, we live in expectation. The difference is that for us, the One who will come will have the features of the Jesus who has already come and is already present and active among us’ (Pontifical Biblical Commission, The Jewish People and their Sacred Scriptures in the Christian Bible, 2001, II, no. 21.)

[43] See Catechism of the Catholic Church, 1992, III, no. 1848.

[44] See Council of Orange (529), canon 1 (DH, 371) and canon 2 (DH, 372).

[45] According to Irenaeus of Lyon, Against the Heresies, III, 6, 1, Jesus is referring here to ‘those who have received adopted sonship’ in him (ed. by A. Rousseau, SCh 211, Cerf, Paris 1974, p. 68).

[46] J. Ratzinger, JRGS 6/2, p. 861: ‘Christ, the human being who is in God, eternally one with God, is at the same time God’s perpetual openness to humanity. He is thus himself what we call “heaven”, for heaven is not a space but a person, the person of him in whom God and humanity are forever united without separation. And we go to heaven, yes, we enter heaven, insofar as we go to Jesus Christ and enter into him’. See also H. U. von Balthasar, Eschatologie, in J. Feiner - J. Trütsch - F. Böckle (ed.), Fragen der Theologie heute, Einsiedeln, Zurich-Cologne 1957, pp. 407-408.

[47] Second Vatican Ecumenical Council, Pastoral Constitution, Gaudium et spes, I, no. 22.

[48] See John of the Cross, The Spiritual Canticle A 38, 3-7; The Spiritual Canticle B 39, 2-7 (Eng. trans. by K. Kavanaugh - O. Rodriguez, Institute of Carmelitan Studies, Washington, D.C. 1991, pp. 471-477).

[49] Paul VI, ‘Final Address of the Second Vatican Council’, 1965, § 8.

[50] See Council of Chalcedon (DH, 301).

[51] Cf. the symbol of the Apostles.

[52] See Thomas Aquinas, Summa contra Gentiles, IV, 81.

[53] B. Pascal, Les Pensées, ed. by Jacques Chevalier, Gallimard, Paris 1954, p. 1207, fgt 258; see Francis, Apostolic Letter Sublimitas et Miseria hominis, 19 June 2023, for the fourth centenary of the birth of Blaise Pascal.

[54] Second Vatican Ecumenical Council, Dogmatic Constitution Lumen Gentium, VII, no. 48; Congregation for the Doctrine of the Faith, Dominus Iesus, 2000, VI, no. 20.

[55] Hippolytus of Rome, The Apostolic Tradition, 6 (ed. by B. Botte, SCh 29, Cerf, Paris 1984, p. 55; Eng. trans. by. G. Dix - H. Chadwick, Routledge, London-New York 1992, p. 11).

[56] Second Vatican Ecumenical Council, Dogm. Const., Lumen Gentium, VIII, no. 62: ‘As the one goodness of God is really poured on in different ways in creatures, so the one mediation of the Redeemer does not exclude, but on the contrary elicits a varied cooperation on the part of creatures in dependence on the one source’.

[57] Second Vatican Ecumenical Council, Past. Const. Gaudium et spes, II, n° 24-25.

[58] Ibid., II, no. 22.

[59] Second Vatican Ecumenical Council, Dogm. Constit. Lumen Gentium, no. 1.

[60] Second Vatican Ecumenical Council, Const. Sacrosanctum Concilium, Appendix.

[61] Theodoret of Cyr, Ecclesiastical History, I, 9 (ed. by L. Parmentier, GCS 19, Hinrichs, Leipzig 1911, pp. 38-42; Eng. trans. by Ph. Schaff - H. Wace, Eedrmans, Grand Rapids [MI.] 1953, pp. 47-48).   

[62] Eusebius, Life of Constantine, III, 17-20 (ed. by I.A. Heikel, GCS 7, Hinrichs, Leipzig 1902, pp. 84-87; Eng. trans. by A. Cameron - S.G. Hall, Clarendon Press, Oxford 1999, pp. 127-130); Card. K. Koch, Verso una celebrazione ecumenica del 1700° anniversario del Concilio di Nicea (325-2025), L’Osservatore Romano, 30 April 2021: ‘Purtroppo con questa decisione venne abbandonata la data comune di Pasqua tra cristiani ed ebrei’.

[63] John Paul II, Meeting with the Jewish Community of Rome, 13 April 1986, no. 4; Benedetto XVI, Luce del mondo. Il papa, la Chiesa e i segni dei tempi. Una conversazione con P. Seewald, LEV, Città del Vaticano 2010, p. 123.

[64] Athanasius of Alexandria, The Life of Saint Antony, 69 (ed. by. G.J.M. Bartelink, SCh 400, Cerf, Paris 1994, pp. 314-316; Eng. trans. by R.T. Meyer, Newman Press, New York-Mahwah 1978, pp. 78-79)

[65] Francis, Apostolic Letter Desiderio desideravi, 2022, n. 10-11: ‘If we too were not given the possibility of a true encounter with him, it would be as if we were declaring the newness of the Word made flesh to be exhausted. On the contrary, the Incarnation, in addition to being the only ever new event known to history, is also the very method that the Holy Trinity chose to open the way to communion for us. The Christian faith is either an encounter with the Him alive, or it does not exist. The liturgy guarantees us the possibility of such an encounter’.

[66] See Epistle to Diognetus, V, 10-11 (ed. by H.I. Marrou, SCh 33, Cerf, Paris 1951, p. 64; Eng. trans. by B.D. Ehrman, LCL 25, Harvard University Press, Cambridge [MA.] 2003, pp. 140-141).  

[67] Athenagoras, Embassy for the Christians, XII, 3 (ed. by B. Pouderon, SCh 379, Cerf, Paris 1992, p. 108; Eng. trans. by J.H. Crehan, The Newman Press, Westminster - Longmans, London 1956, p. 43); XXIV, 2 (ed. B. Pouderon, pp. 160-162; Eng. trans. by J.H. Crehan, p. 62).  

[68] Ambrose, Exposition of the Christian Faith, I, 1, 8 (ed. by O. Faller, CSEL 78, Hoelder-Pichler-Tempsky, Wien 1962, p. 7).

[69] Hilary of Poitiers, On the Trinity, II, 1 (ed. by P. Smulders, CCSL 62A, p. 38; Eng. trans. by S. McKenna, The Catholic University of America Press, Washington D.C. 2007, pp. 35-36).

[70] Ephrem of Nisibe, De fide, 52; 59; 76 (Eng. trans. by J.B. Morris, John Henry Parker, Oxford 1847, pp. 273, 300, 347).

[71] Athanasius, Against the Arians, II, 41, 4 (Athanasius Werke, I/1, 2, ed. K. Metzler - K. Savvidis, p. 218), and: II, 41, 5 (Athanasius Werke, I/1, 2, ed. by K. Metzler - K. Savvidis, p. 218). 

[72] See also Basil of Caesarea, On the Holy Spirit, 26 (ed. by C.F.H. Johnston, Clarendon Press, Oxford 1892, pp. 59-61; Eng. trans. by D. Anderson, St. Vladimir’s Seminary Press, New York 1980, pp. 46-47): ‘What makes us Christians? Our faith, everyone would answer. How are we saved? Obviously through the regenerating grace of baptism. How else could we be? We are confirmed in our understanding that salvation comes through Father, Son, and Holy Spirit. Shall we cast away the standard of teaching we received? [...] If baptism is the beginning of my life, and the day of my regeneration is the first of days, it is obvious that the words spoken when I received the grace of adoption are more honorable than any spoken since’. Likewise, regarding the Holy Spirit: Athanasius, First Letter to Serapion, 30 (Athanasius Werke, I/1, 1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1934, pp. 523-526).

[73] Athanasius, Against the Arians, II, 42, 3 (Athanasius Werke, I/1, 2, ed. K. Metzler - K. Savvidis, p. 219); Basil of Caesarea, On the Holy Spirit, 26 (ed. by C.F.H. Johnston, pp. 59-61; Eng. trans. by D. Anderson, pp. 46-47); Gregory of Nyssa, Catechetical Discourse, I, 2 (ed. by E. Mühlenberg, GNO III/4, Brill, Leiden-New York 1996, pp. 12-13; Eng. trans. by I. Green, St. Vladimir’s Seminary Press, Yonkers [N.Y.] 2019, pp. 68-69). 

[74] Cf. Ambrose, Exposition of the Christian Faith, I, 9, 58 (ed. by O. Faller, p. 25); also Zeno of Verona, Sermon, II, 5, 9 (ed. B. Löfstedt, CCSL 22, Brepols, Turnhout 1971, p. 167).

[75] See Athanasius, De decretis Nicaenae synodi, 33, 1-7 (Athanasius Werke, II/1, 1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1935, pp. 28-29).

[76] Hilary of Poitiers, Against Constantius, 16 (ed. by A. Rocher, SCh 334, Cerf, Paris 1987, pp. 200-201). In it, Hilary defends Nicaea against the accusation that it does not conform to Scripture: according to him, new diseases require a new composition of remedies. For example, the expression ‘innascible’, which was a hobbyhorse of Arius, Aetius and Eunomius, is not a biblical word for the Father either: ‘You declare that “the Son is like the Father”. The Gospels do not preach this. Why do you not reject this statement?’ (Eng. trans. by R. Flower, Liverpool University Press, Liverpool, p. 129).

[77] Athanasius, Epistula ad Afros episcopos, 1, 1 (Athanasius Werke, II/8, ed. by H.Ch. Bennecke - U. Heil - A. von Stockhausen, De Gruyter, Berlin-New York 2006, pp. 323-323); the Nicene Creed is ‘sufficient’. Cf. Athanasius, Epistula ad Epictetum, 1 (PG 26, col. 1049-1052).

[78] The term ‘Nicene’ could also be applied to formulations of confessions of faith that extended the Nicene symbol, at least as long as they retained its content and did not adopt opposing doctrines. See DH, 300 (and supra, § 4).

[79] Council of Chalcedon, Actio 3, 10.12; 2,1,2, 79 [gr.]; 2,3,2, 5f [lat.]) (DH, 300); the ‘definition’ (horos) of Chalcedon is based on Nicaea, together with the Symbol of the 150 Fathers meeting in Constantinople (ACO 2,1,2, 126-129 [gr]): ‘Now, for the perfect knowledge and strengthening of the right faith, this wise and salutary Symbol of divine grace would have sufficed in itself, for it teaches about the Father, the Son and the Holy Spirit what is definitive, and puts the incarnation of the Lord before the eyes of those who are ready to accept it with faith’. In the words of the author: Sufficeret quidem ad plenam cognitionem pietatis et confirmationem sapiens hoc et salutare divinae gratiae Symbolum; de Patre enim et de Filio et de Spiritu sancto perfectionem docet et inhumanationem fideliter accipientibus repraesentat (COeD, 1962, p. 60).

[80] Francis, Bull of Indiction for the Ordinary Jubilee of the Year 2025, Spes non confundit, n. 17.

[81] This is a symbolic reference to Gen 14:14.

[82] Athanasius, De synodis 5, 1-3 (Athanasius Werke, II/1, 1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1935, p. 234).

[83] Basil of Caesarea, Homily XVI on ‘In the Beginning was the Word’ (PG 31, col. 471-482). It should be noted, however, that the Symbol, unlike John’s prologue, avoids the term ‘Logos’. As a central concept of Greek philosophy, it was almost inevitably understood in a subordinationist (Arian) way by the Fathers familiar with Greek philosophy.

[84] Chromatius of Aquileia, Sermon, 21, 3: ‘Whoever, like Photinus or Arius, “does not believe that Christ is God, or that the Son is from the Father”, insults the evangelist John’ (ed. by J. Lemarié, p. 44); Id., Sermon, 18, 1: ‘For the one who follows Christ there is always daylight, for he walks in eternal light’ (ed. by J. Lemarié, p. 8); Id., Sermon, 8, 4: ‘The throne of God is one, the throne of the majesty of the Father and the majesty of the Son’, ‘there is no difference in dignity’ (ed. by J. Lemarié, pp. 192-195).

[85] Zeno of Verona, Sermon, II, 5, 9-10; II, 8 (ed. by B. Löfstedt, CCSL 22, Brepols, Turnhout 1971, pp. 167, 176-178).

[86] John Chrysostom, Three Baptismal Catechesis, III, 1 (ed. by A. Piédagnel - L. Doutreleau, SCh 366, Cerf, Paris 1990, pp. 214-215).

[87] Augustine of Hippo, De agone christiano, 18 (ed. by J. Zycha, CSEL 41, Tempsky, Wien 1900, pp. 121-122); De fide et symbolo, V, 11-12; VIII, 18 (ed. by J. Zycha, CSEL 41, Tempsky, Wien 1900, pp. 14-15, 20-22). The actual theological debate with the Homoeans is conducted by Augustine in De Trinitate I-VII as well as in Contra sermonem Arianorum and Contra Maximinum haereticum Arianorum episcopum (Augustine of Hippo, Opera - Werke, ed. by H.J. Sieben, Brill, Schöningh 2008).

[88] Gregory of Nyssa, Catechetical Discourse, 39, 5: ‘He who has a mind at all must by all means choose one of the two, either to believe the holy Trinity belongs to the uncreated nature and thus to make [the Trinity] the author of his own life by a spiritual begetting, or, if he should deem the Son or the Holy Spirit to be outside the first, and true, and good nature of God (I mean of the Father), not to include faith in these [persons] at the time of begetting [i.e., baptism], lest it should escape his notice that he is giving himself in adoption to a nature that is deficient and in need of someone to make it good, and in some manner introduce himself again to what is akin to himself, by deserting faith in the transcendent nature» (ed. by E. Mühlenberg, pp. 100-101; Eng. trans. by I. Green, pp. 151-152).

[89] Ambrose, Commentary on Luke IV, 67 (ed. by C. Schenkl - H. Schenkl, CSEL 32, Tempsky, Wien 1897, p. 173).

[90] A. Grillmeier, ‘Das Gebet zu “Jesus” und das “Jesusgebet”, in Fragmente zur Christologie. Studien zum altkirchlichen Christusbild, Herder, Freiburg 1997, pp. 357-371.

[91] 2 Cor 12:8,9; Rom 10:12; 2 Pet 3:18; invocations inserted into the liturgy: 1 Cor 16:22; Rev 22:20; cf Didache 10:6.

[92] In particular, Phil 2:6-11; Col 1:15-20; Eph 1:3-10; 1 Tim 3:16; Rev 5:6-14.

[93] See Origen, On Prayer, X, 2 (ed. by P. Koetschau, GCS 3, Hinrichs, Leipzig 1899, pp. 320-321); XV, 1: ‘Perhaps if we understand what prayer is, we shall see that we should not pray to any being that is produced, not even to Christ’ (ed. by P. Koetschau, p. 333); XVI, 1 (ed. by P. Koetschau, p. 336); Against Celsus, VIII, 13 (ed. by. P. Koetschau, pp. 230-231; Eng. trans. by H. Chadwick, Cambridge University Press, Cambridge 1953, p. 461).

[94] Basil of Caesarea, On the Holy Spirit, 25-29; 68 (ed. C.F.H. Johnston, pp. 58-66, 133-135; Eng. trans. by D. Anderson, pp. 45-51, 102-103).

[95] For example, Athanasius, who uses the traditional doxology in an anti-Sabellian way, and Basil of Caesarea, On the Holy Spirit, 3-4; 16 (ed. C.F.H. Johnston, pp. 16-20, 36-38; Eng. trans. by D. Anderson, pp. 17-19, 33-34), who stresses the difference between oikonomia (Christ’s saving mediation) and theologia (son of equal importance).

[96] See for example the Traditio Apostolica: during the consecration of bishops and presbyters, as well as during the Eucharistic Prayer, the final doxology is as follows: ‘Through your servant Jesus Christ, through whom be glory to the Father, the Son and the Holy Spirit’; Origen, Homilies on Luke, XXXVII, 5 (ed. by M. Rauer, GCS 35, Hinrichs, Leipzig 1930, pp. 220-221; Eng. trans. by J.T. Lienhard, The Fathers of the Church 94, The Catholic University of America Press, Washington, D.C. 1996, p. 155); Gregory of Nazianzus, Oration XIX, 17: ‘The single glory and splendor of Godhead in Father, Son, and Holy Spirit, to whom be the glory and the honor and the worship forever and ever’ (PG 35, col. 1064; Eng. trans. by M. Vinson, The Fathers of the Church 107, The Catholic University of America Press, Washington D.C. 2003, p. 106); Oration XVII, 13: ‘In Jesus Christ our Lord, to whom be the power and the glory, the honor and the kingdom, as he is and has been and will be forever and ever, together with the Father and the Holy Spirit’ (PG 35, col. 981; Eng. trans. by M. Vinson, p. 94).

[97] Basil of Caesarea, On the Holy Spirit, 73 (ed. C.F.H. Johnston, pp. 142-145; Eng. trans. by D. Anderson, pp. 109-110). The example of Bishop Leontius of Antioch shows how explosive the question of the form of the doxology could become in the life of the local Churches: in order not to fall out with the Arians or their adversaries, he no longer pronounced the words of the doxology aloud, but ‘all that those standing near him could hear was the “For priesthood and still ranked with the laity, ever and ever”’ (Theodoret of Cyr, Ecclesiastical History, II, 24, 3; ed. by L. Parmentier, GCS 19, Hinrichs, Leipzig 1911, pp. 38-42; Eng. trans. by P. Schaff - H. Wace, Eerdmans Publishing Company, Grand Rapids 1953, p. 84 ).

[98] Basil of Caesarea, Letter 159, 2 (PG 32, col. 620-621; Eng. trans. by J. Deferrari, Fathers of the Church, New York 1951, p. 313). See also Basil of Caesarea, Letter 125, 3 (PG 32, col. 549-552; Eng. trans. by J. Deferrari, p. 257); On the Holy Spirit, 16; 24; 26 (ed. by C.F.H. Johnston, pp. 36-38, 55-58, 59-61; Eng. trans. by D. Anderson, pp. 33-34, 45, 46-47).

[99] Text in A. Grillmeier, Fragmente zur Christologie, p. 365.

[100] Gregory of Nyssa, Letter V, 7 (ed. by P. Maraval, SCh 363, Cerf, Paris 1990, pp. 283-285; Eng. trans. by A.M. Silvas, Brill, Leiden-Boston 2007, p. 139).

[101] Cassiodorus, Explanation of the Psalms, proem. XVII (ed. by M. Adriaen, CCSL 97, Brepols, Turnhout 1958, pp. 22-23; Eng. trans. by P.G. Walsh, Paulist Press, Mahwah 1990, p. 41).

[102] Second Synod of Vaison (524 AD), canon 5, Mansi 8, col. 725: Quia non solum in sede apostolica, sed etiam per totum Orientem et totam Africam vel Italiam propter Haereticorum astutiam, qui Dei filium non semper cum Patre fuisse, sed a tempore coepisse blasphemant, in omnibus clausulis post Gloriam patri etc. Sicut erat in principio licitur; etiam et nos in universis ecclesiis nostris hoc ita dicendum esse decernimus. Sicut erat in principio dicitur; etiam et nos in universis ecclesiis nostris hoc ita dicendum esse decernimus.

[103] Sozomen, Ecclesiastical History, VIII, 8, 1-3 (ed. by G.Ch. Hansen, GCS N.F. 4, De Gruyter, Berlin 1995, pp. 360-361; Eng. trans. by Ph. Schaff - H. Wace, Eerdmans, Grand Rapids [MI.] 1952, p. 404); Ambrose, Contra Auxentium sermo de basilicis tradendis XXXIV (ed. by M. Zalzer, CSEL 82/3, Brepols, Turnhout 1982, p. 105).

[104] See, for example, Ephrem of Nisibe, De Nativitate IV, 143-214; especially IV, 154-156, which is very clear: ‘While He was lying on His Mother’s breast / in Her womb all creatures were lying / He was silent as a baby / and yet He made His creatures carry out / all His commands. / For without the First-Born, / no human being can / approach the Essence. / He alone is capable of it’ (ed. by E. Beck, CSCO 186, Secrétariat du CorpusSCO, Louvain 1959, p. 39; CSCO 187, p. 34; Eng. trans. from: ed. by F. Cassingena-Trévedy, SCh 459, Cerf, Paris 2001, p. 103).

[105] Ephrem of Nisibe, De fide LXXVI, 1-3.7 (ed. by E. Beck, CSCO 154, pp. 232-233; CSCO 155, pp. 198-199; Eng. trans. by J.B. Morris, John Henry Parker, Oxford 1847, p. 347); VI, 1-6 (ed. by E. Beck, CSCO 154, pp. 24-27; CSCO 155, pp. 18-20; Eng. trans. by J.B. Morris, John Henry Parker, Oxford 1847, pp. 126-133).

[106] See Ephrem of Nisibe, De fide XL and LXXXIII.

[107] Ephrem of Nisibe, De fide LII, 1-3 (ed. by E. Beck, CSCO 154, pp. 161-162; CSCO 155, p. 138; Eng. trans. by J.B. Morris, John Henry Parker, Oxford 1847, p. 274).

[108] Ephrem of Nisibe, Hymns against heresies, XXII, 20 (ed. by D. Cerbelaud, SCh 587, Cerf, Paris 2017, p. 399). It should be noted that, even if Saint Ephrem’s teaching is perfectly in line with Nicene orthodoxy, the vocabulary and expression are not those of Nicaea, which is surely due to the consciously chosen poetic rather than discursive form of his teaching. Cf. eng. trans. by J.B. Morris, pp. 175-177.

[109] Balai (Balaeus), Gebete (ed. by S. Landersdorfer, BKV 1/6, Jos. Kösel, Kempten [München] 1912, p. 92); Isaac of Antioch, First poem on the Incarnation (Sancti Isaaci Antiochi Doctoris syrorum opera omnia, ed. by G. Bickell, Typis Killeri Gissensis, Gissae 1873, p. 23).

[110] Prudentius, Apotheosis, 309-311 (ed. by M.P. Cunningham, CCSL 126, Brepols, Turnhout 1966, p. 87; Eng. trans. by H.J. Thomson, LCL 387, Harvard University Press, Cambridge [MA.] 1949, p. 143).

[111] See Irenaeus of Lyon, Against the Heresies IV, 34, 1, so often quoted by Henri de Lubac: Omnem novitatem attulit, semetipsum afferens (ed. by A. Rousseau, SCh 100, Cerf, Paris 1965, pp. 846-847). See also Francis, Evangelii gaudium, 2013, no. 11.

[112] On this distinction, see Second Vatican Ecumenical Council, Dogm. Const. Dei Verbum, I, n. 2-5 and II, n. 7-8.

[113] Irenaeus of Lyon, Against the Heresies IV, 5, 1 (ed. by A. Rousseau, SCh 100, Cerf, Paris 1965, pp. 426-427).

[114] ‘If we receive human testimony, the testimony of God is greater, because this is the testimony of God: he has testified to his Son. Those who believe in the Son of God have the testimony in themselves’ (1 Jn 5:9).

[115] Second Vatican Ecumenical Council, Dogm. Const. Dei Verbum, I, no. 2.

[116] J. Ratzinger, Gesammelte Schriften, Band VI/1, 408f, Herausgeber: Gerhard Ludwig Müller, Freiburg im Breisgau, Herder Verlag 2014; J. Ratzinger/Benedict XVI, Jésus de Nazareth, 1. Du Baptême dans le Jourdain à la Transfiguration, Paris, Flammarion 2007, p. 377-378.

[117] See Second Vatican Ecumenical Council, Dogm. Const. Dei Verbum, I, n. 2; cf. 2 Pet 1:4.

[118] See Thomas Aquinas, Summa Theologiae, II-II, q. 25, a. 1, Resp.

[119] Paul emphasises that Christ makes us enter into the very mind of God, since he quotes Isaiah 40:13: ‘Who has known the mind of the Lord (LXX: noûn Kuriou; Heb: ruah Adonai) so as to instruct him? But we have the mind of the Lord’ (cf. also Rom 11:34). See M. Quesnel, La première épître aux Corinthiens, Commentaire Biblique: Nouveau Testament, Cerf 2018, pp. 88-92.

[120] Francis, Encyclical Letter Lumen Fidei, 2013, no. 18.

[121] Ibid., no. 27, which quotes Gregory the Great, Homilies on the Gospels, II, 27, 4 (PL 76, col. 1207).

[122] See Francis, Address in Naples on the occasion of the conference ‘Theology after Veritatis Gaudium in the Mediterranean context’, 21 June 2019, p. 9.

[123] ‘Through the grandeur and beauty of creatures, we can contemplate, by analogy, their Author.’ (Wis 13:5). See Sancti Thomae de Aquino Scriptum super Sententiis liber I, q. 1, a. 2, ad 2, which refers to the analogia creaturae ad creatorem.

[124] See M. Lochbrunner, Analogia Caritatis: Darstellung und Deutung der Theologie Hans Urs von Balthasars, Freiburg im Breisgau - Basel - Wien, Herder 1981 (Freiburger Theologische Studien, 120), p. 62 and pp. 292-293. See also International Theological Commission (ITC), Theology, Christology and Anthropology, 1981, D, no. 1: ‘The proclamation of Jesus Christ, the Son of God, is presented under the biblical sign of “for you”. This is why the whole of Christology must be treated from a soteriological point of view. It is therefore right, in a certain sense, that modern authors have attempted to work out a “functional” Christology. But, conversely, it must also be held that the “existence for othersˮ of Jesus Christ cannot be separated either from his relationship to the Father or from his intimate communion with him and for that reason it must be founded on his eternal sonship. The pro-existence of Jesus Christ, through which God communicates himself to human beings, presupposes his pre-existence’.

[125] This is why St. Thomas Aquinas insists that Adam was endowed with grace from his creation, without which he would not have been able to fulfil his human vocation. See Sancti Thomae de Aquino Scriptum super Sententiis liber II, d. 29, q. 1, a. 2; d. 30, q. 1, a. 1; Summa Theologiae, I, q. 95, a. 1; I-II, q. 109, a. 5.

[126] J. Ratzinger/Benedict XVI, Ils regardont celui qu’ils ont transpercé: Contributions à une christologie spirituelle, Fr. trans. by R. Kremer - M.L. Wilverth-Guitard, Éd. Salvator, Paris 2006, p. 29 (JRGS VI/2, p. 701).

[127] Ibid., pp. 30-31 (JRGS VI/2, p. 702).

[128] ‘Amen, amen, I say to you: the Son can do nothing of himself; he does only what he sees the Father doing; what the Father does, the Son does likewise. For the Father loves the Son and shows him everything he does. He will show him even greater works, so that you all will be amazed’ (Jn 5:18-20); ‘This is the message you all have heard from the beginning: let us love one another’ (1 Jn 3:11).

[129] J. Ratzinger/Benedict XVI, Ils regardont celui qu’ils ont transpercé, p. 38 (JRGS VI/2, p. 707).

[130] See Benedict XVI, Encyclical Letter Caritas in Veritate, 2009, no. 33.

[131] P. Florensky, La colonne et le fondement de la vérité, L’Âge d’Homme, Lausanne 1975, p. 42 (modified translation). When Florensky speaks of the “definition of the Church”, he means the mystery of the Church in all its mystical and theological depth rather than the ecclesiastical institution.

[132] Athanasius, De decretis Nicaenae synodi, I, 2, 1: Τοῦ Θεοῦ Λόγον ἀρνούμeνοι, εἰκότως καὶ λόγον παντός εἶσιν ἕρημοι (Athanasius Werke, II/1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1935, p. 2).

[133] See Augustine, Confessions, III, 6, 11 (ed. by P. Knöll, CSEL 33, Tempsky, Wien 1896, p. 33); Thomas Aquinas, Summa Theologiae, I, q. 104, a. 1, Resp.

[134] Cf. supra, § 32 to 37.

[135] See ITC, Theology, Christology and Anthropology, 1982, C.

[136] Francis, Apostolic Exhortation Evangelii Gaudium, 2013, III, no. 115.

[137] Second Vatican Ecumenical Council,Past. Const. Gaudium et spes, II, ch. II, no. 53, § 1: ‘It is proper to the human being to attain humanity truly and fully only through culture, that is, by cultivating the goods and values of nature’.

[138] Francis, Apostolic Exhortation Evangelii Gaudium, 2013, III, no. 115. See also, as examples, idem, Letter on the role of literature in formation, 17 July 2024; Letter on the renewal of the study of the history of the Church, 21 November 2024.

[139] Francis, Apostolic Constitution Veritatis Gaudium, 2017, no. 2, which draws on Pope Paul VI’s Apostolic Exhortation Evangelii nuntiandi, 1975, 19.

[140] Second Vatican Ecumenical Council, Decree Ad gentes, II, no. 11.

[141] For example, the Egô eimi of the fourth Gospel, or the terminology of Heb 1:3 or 2 Pet 1:4.

[142] John Paul II, Encyclical Faith and Reason, 1998, VI, no. 72: ‘When the Church comes into contact with great cultures she has not encountered before, she cannot leave behind what she has acquired through her inculturation into Greco-Latin thought. To reject such a heritage would be to go against the providential plan of God, who leads his Church along the paths of time and history’.

[143] Ibid., VI, no. 71.

[144] See the theme of the “theology of listening” as an antidote to the “Babel syndrome”, Francis, Speech in Naples on the occasion of the conference “Theology after Veritatis Gaudium in the Mediterranean context”, 21 June 2019, pp. 4-5.

[145] This purification and transfiguration of cultures is what makes it possible to avoid the risk of relativism, highlighted by the Congregation for the Doctrine of the Faith, Dominus Iesus, 2000, no. 4.

[146] John Paul II, Encyclical Faith and Reason, 1998, VI, no. 70: ‘The encounter of faith with different cultures has in fact given birth to a new reality’. On the maintenance of cultural identity, see ibid., no. 71.

[147] Epistle to Diognetus, V, 1-4 (ed. by H.I. Marrou, p. 64; Eng. trans. by B.D. Ehrman, pp. 138-141).

[148] ‘In the future, it will come to pass that the mountain of the House of the Lord will be established as the highest of mountains and will be elevated above the hills. All peoples will flock to it. Many peoples will set out and say, “Come, let us go up to the mountain of the Lord, to the House of the God of Jacob. [...] From Sion goes forth the Law, and from Jerusalem the word of the Lord. [...] Nation shall not lift up sword against nation, neither shall they learn to fight any more”’ (Is 2:2-4; cf. Mic 4:1-4); ‘My House will be called: House of prayer for all peoples’ (Is 56:7; cf. Zech 14:16).

[149] It is striking to note how Paul, proclaiming the Gospel in the wake of Pentecost, celebrates the unity of the human family at Areopagus: ‘From one he made all peoples to dwell on all the face of the earth, determining the times of their history and the boundaries of their habitation’ (Acts 17:26).

[150] See John Paul II, Encyclical Faith and Reason (1998), VII, no. 95-96.

[151] See Alexander of Alexandria, Letter to Alexander of Byzantium, 5 (Athanasius Werke, III/1, ed. by H.-G. Opitz, De Gruyter, Berlin-Leipzig 1934, pp. 19-29 = Urkunde 14; Eng. trans.: Fontes Nicaenae Synodi, p. 43).

[152] See ITC, Synodality in the life and mission of the Church, 2018, I, no. 19.

[153] Cyprian, Letter XIV, 4 (ed. by G. Hartel, CSEL III/2, Geroldi, Wien 1871, p. 512; Eng. trans. by R.B. Donna, The Fathers of the Church 51, The Catholic University of America Press, Washington, D.C. 1964, p. 43). This development on Ignatius of Antioch and Cyprian of Carthage is close to the ITC document, Synodality, I, no. 25, which should be consulted for further details.

[154] ITC, Synodality, I, no. 28.

[155] See J. A. Brundage, Medieval Canon Law, London-New York, Longman, 1995, p. 5.

[156] Joint International Commission for Theological Dialogue between the Catholic Church and the Orthodox Church, Ravenna Document: Ecclesiological and Canonical Consequences of the Sacramental Nature of the Church, Ecclesial Communion, Conciliarity and Authority, 2007, no. 26: A synod is in principle ‘governed according to the principle of consensus and concord (harmonia) expressed in Eucharistic concelebration, as implied in the final doxology of the Apostolic Canon, no. 34’; ‘The Church [reveals] herself as Catholic in the synaxis of the local Church’ (ibid., n° 22).

[157] See Second Vatican Ecumenical Council, Const. Sacrosanctum Concilium, I, no. 10; ITC, Synodality, II, no. 47.

[158] ITC, Synodality, II, no. 29.

[159] Rousselot considered that certain heuristic procedures of St. Thomas corresponded to a ‘reciprocal priority and anteriority’ of two inseparable principles ordered in relation to each other (P. Rousselot s.j., “Les Yeux de la foi”, RSR, 1910, p. 448).

[160] See Augustine of Hippo, Sermon, 43, 7 and 9: Crede ut intelligas (ed. by C. Lambot, CCSL 41, Brepols, Turnhout 1961, pp. 511-512); Anselm, Proslogion, 1, 100: Credo ut intelligam (ed. by M. Corbin, Cerf, Paris 1986, pp. 242-243).

[161] Paul VI, Encyclical Letter Ecclesiam suam, 1964, III, no. 71[68]: ‘Was it not the intention, and rightly so, to assign to the [Second Vatican] Council itself a pastoral objective which amounts to inserting the Christian message into the stream of thought, expression, culture, customs and sensibilities of humanity as it lives and moves on the face of the earth today?’.

[162] See Second Vatican Ecumenical Council, Dogm. Const. Dei Verbum, II, nos. 7-8.

[163] See Catechism of the Catholic Church, 1992, no. 156, with reference to the dogmatic constitution Dei Filius of the First Vatican Council, chapter 3 (DH, 3008).

[164] Hoc autem testimonium vel est hominis tantum: et istud non facit virtutem fidei, quia homo et fallere et falli potest. Vel istud testimonium est ex iudicio divino: et istud verissimum et firmissimum est, quia est ab ipsa veritate, quae nec fallere, nec falli potest. Et ideo dicit, ad Deum, ut scilicet assentiat his quae Deus dicit (Sancti Thomae de Aquino Super Epistolam B. Pauli ad Hebraeos lectura [rep. vulgata], cap. 6, l. 1).

[165] The term usually used is “filiation”, but the point here is to insist on filiation’s beginning, the actual movement by which we become sons and daughters of God.

[166] Second Vatican Ecumenical Council, Dogm. Const. Dei Verbum, III, no. 12: ‘To discover the intention of the sacred writers, we must, among other things, also consider “literary genresˮ. For it is in quite different ways that truth is proposed and expressed in texts that are variously historical, or prophetic, or poetic, or even in other forms of discourse. [...] Nevertheless, Sacred Scripture must be read and interpreted in the light of the same Spirit in which it was written’.

[167] Dei Verbum, I, no. 2: ‘This economy of Revelation comprises works and words (gestis verbisque) intimately linked together, so that the works, accomplished by God in the history of salvation, attest to and corroborate the teaching and the meaning indicated by the words, while the words proclaim the works and shed light on the mystery they contain’.

[168] Benedict XVI, Verbum Domini, Apostolic Exhortation on the Word of God in the life and mission of the Church, 2010, no. 55.

[169] ‘The Mystery of the Church is more profound, if that be possible, more “difficult to believe in” than the Mystery of Christ, just as that was already more difficult to believe in than the Mystery of God’, in H. de Lubac, Catholicisme: Les aspects sociaux du dogme (1938), in Œuvres complètes VII, ed. by M. Sales, S.J. - M.-B. Mesnet, Cerf, Paris 2003, pp. 48-49.

[170] Second Vatican Ecumenical Council, Decree Unitatis redintegratio, II, 11.

[171] See the reference text L’interpretazione dei dogmi (1990), II, 3, § 3, in Commissione Teologica Internazionale, Documenti 1969-2004, seconda edizione riveduta e corretta, prefazione Card. W. J. Levada; introduzione L. Ladaria, SJ, Bologna, Edizioni Studio Domenicano, 2010, p. 403; see also First Vatican Ecumenical Council, Dogm. Const. Dei Filius, IV (DH, 3016).

[172] We can think of the idea of “conversation in the Holy Spirit”, cf. Francis, “Address at the opening of the XVIth session of the Synod of Bishops”, 4 October 2023: “The Church, a single harmony of voices, with many voices, the work of the Holy Spirit: this is how we must conceive of the Church”.

[173] See ITC, Synodality, I, nos. 19-21.

[174] See ITC, Sensus fidei in the life of the Church, 2014, III, nos. 67-86.

[175] See Second Vatican Ecumenical Council, Dogm. Const. Dei Verbum, II, no. 10.

[176] ITC, Sensus fidei in the life of the Church, 2014, III, no. 77.

[177] Second Vatican Ecumenical Council, Decree Ad gentes, III, no. 15.

[178] Y. Congar, La Tradition et les traditions: Essai théologique, vol. II, Fayard, Paris 1963, p. 185: ‘All my faith is in the most banal of my signs of the cross, and, when I pronounce “Our Father”, I have already included all that knowledge of which will be delivered to me only in the Revelation of glory’.

[179] ITC, Theology Today: Perspectives, Principeles and Criteria (2012), no. 33: ‘The subject of faith is the people of God taken as a whole, which, in the power of the Spirit, affirms the Word of God. This is why the Council declares that the whole people of God participates in the prophetic ministry of Jesus, and that, having received the anointing of the Holy Spirit (1 Jn 2:20.27), it “cannot err in matters of faith”’.

[180] Tertullian, Liber de praescriptionibus adversus haereticos, XX, 8-9 (ed. by R.F. Refoulé - P. de Labriolle, SCh 46, Cerf, Paris 1957, pp. 113-114).

[181] Second Vatican Ecumenical Council, Dogm. Const. Lumen Gentium, II, no. 12.

[182] Ibid., III, no. 24 in fine, and no. 25.

[183] E. Peterson, Der Monotheismus als politisches Problem: Ein Beitrag zur Geschichte der politischen Theologie im Imperium Romanum, Hegner, Leipzig, 1935, pp. 104f: ‘This concept of politico-religious propaganda was taken up by the Church as it expanded throughout the Roman Empire. It came up against a conception of pagan theology in which the divine monarch reigned, but in which the national gods governed. In response to this pagan theology, which was tailored to the Roman Empire, it was affirmed on the part of Christians that the national gods could not reign because national plurality had been abolished. [...] The Christian proclamation of a God in three persons goes beyond Judaism or paganism, since the mystery of the Trinity exists in the divinity itself, not in its creature. Likewise it is true that peace, which the Christian seeks, is not guaranteed by any emperor, but can only be a gift from him “who is above all reason”’.

[184] ITC, Sensus fidei in the life of the Church, 2014: see no. 26 on Newman and the criterion of the sensus fidei fidelium against the divergences of the bishops of the fourth century; no. 34 on the renewed conception in the nineteenth century of the active and not merely passive character of the sensus fidei fidelium; and nos. 113 and 118 on the relationship between the sensus fidei and majority public opinion, inside and outside the Church.

[185] Francis, Apostolic Constitution Veritatis Gaudium, 2017, no. 3.

[186] Letter 90 “To Natalia Dmitrievna Fonvizina, late January-February 1854, Omsk”, in F. Dostoyevsky, Correspondance, vol. I, ed. by J. Catteau, Fr. trans. by Anne Coldefy-Faucard, Bartillat, Paris 1998, p. 341.

[187] Francis, Apostolic Exhortation Evangelii Gaudium, 2013, III, no. 198: ‘[The poor] have much to teach us. Not only do they share in the sensus fidei, but through their own sufferings they know the suffering Christ. We need to allow ourselves to be evangelised by them. The new evangelisation is an invitation to acknowledge the saving power at work in their lives, and to place them at the centre of the Church’s journey. We are called to find Christ in them, to lend our voice to their causes, but also to be their friends, to listen to them, to understand them and to welcome the mysterious wisdom God wants to share with us through them’.

[188] See Catechism of the Catholic Church, 1992, no. 540: ‘Christ vanquished the Tempter for us’. See also no. 394, no. 540, no. 677.

[189] Second Vatican Ecumenical Council, Declaration on Religious Freedom Dignitatis humanae, II, no. 11: ‘Taught by Christ’s word and example (Christi verbo et exemplo edocti), the Apostles followed the same path. In the early days of the Church, Christ's disciples did not use coercion or devices unworthy of the Gospel to bring people to confess Christ as Lord, but above all through the power of the Word of God. With courage, they proclaimed to all the purpose of God the Saviour “who desires all human beings to be saved and to come to knowledge of the truthˮ (1 Tim 2:4). At the same time, however, their attitude towards the weak, even those living in error, was one of respect, showing how “each of us is to render an account of himself or herself to God" (Rom 14:12), and for that reason is bound to obey his or her own conscience. Like Christ, the Apostles were always diligent to bear witness to God’s truth, full of boldness to “proclaim the Word of God with confidence” (Acts 4:31) before the people and their leaders’.

[190] Francis, Encyclical Letter Dilexit nos, 2024, V, no. 214.