How the Fathers Confessed the Father, the Son, and the Holy Spirit
Before all else: a word of warning
The Trinity cannot be encompassed. This is not a pious formula but the very structure of the knowledge of God. God reveals Himself truly, but does not allow Himself to be exhausted by the human mind. We know Him through grace, through purification, through the Liturgy, and through confession, but we do not possess Him through definitions.
Saint Gregory the Theologian, at the beginning of his First Theological Oration, warns that not everyone, not everywhere, and not at every time may speak about God: not everyone, but only the one who has been purified; not at any time, but in the hour of inner stillness; not about anything, but only about what has been granted to us. Whoever begins otherwise, begins badly.
This article therefore does not aim to describe the Trinity, but to introduce the reader into Its Mystery through the voice of those whom the Church has named Theologians — Saint John the Evangelist, Saint Gregory of Nazianzus, and Saint Symeon the New Theologian — and through the voice of the Fathers who, in antiquity, bore witness to the same Mystery: Saint Irenaeus of Lyons, Saint Athanasius the Great, the Holy Cappadocians, Saint Maximus the Confessor, Saint John of Damascus, and Saint Gregory Palamas.
None of these “explained” the Trinity. All of them confessed It. This is the difference between theology and the schools.
I. The point of departure: the Trinity is not deduced, but revealed
Saint Gregory the Theologian, in his Second Theological Oration, ascends with Moses upon Mount Sinai. There, in darkness and cloud, man does not see the face of God, but only the traces of His passing — His “back,” according to the word of Exodus. This is not a provisional limitation of our knowledge, which academic theology might overcome through a better method. It is the very nature of the relation between creature and Creator.
The Trinity is not a conclusion at which we arrive through reasoning. The Trinity is God Himself revealing Himself: the Father who sends, the Son who comes, the Spirit who is given. The witness of the Church does not begin from a doctrine, but from the Baptism of the Lord in the Jordan, where the Father spoke from the heavens, the Son stood in the water, and the Spirit descended in the form of a dove. For this reason the feast of Theophany is called in Tradition the “Manifestation of the Lord” — a manifestation of the Trinity.
Saint Basil the Great, in On the Holy Spirit, observes that the very command of baptism given by Christ — “baptizing them in the name of the Father and of the Son and of the Holy Spirit” — is the foundation of our knowledge of the Trinity. Not a theological speculation, but a liturgical command: whoever is baptized enters into the Trinity, and whoever enters into the Trinity knows Her through participation, not through understanding.
Saint Gregory of Nazianzus summed up this whole paradox of trinitarian knowledge in a sentence which Tradition has never surpassed: “No sooner do I conceive of the One than I am illumined by the splendor of the Three; no sooner do I distinguish Them than I am carried back to the One. When I think of any One of the Three, I think of Him as the Whole, and my eyes are filled with tears of joy. And the greater part of what I think escapes me.”
Whoever rests content with the thought of the One without the splendor of the Three falls into Judaism or Unitarianism. Whoever rests content with the splendor of the Three without rest in the One falls into tritheism. Only this movement between the One and the Three, which never ceases, is true theology.
II. Saint Irenaeus of Lyons: the Trinity at the dawn of confession
Before Nicaea, before the Cappadocians, the Church already confessed the Trinity. Saint Irenaeus of Lyons, the disciple of Saint Polycarp — who in turn had been the disciple of Saint John the Evangelist — writes in Against Heresies (end of the second century) against the Gnostics, who sought to turn God into a system of emanations.
Saint Irenaeus uses an image which Tradition would preserve as a foundation stone: the Son and the Holy Spirit are “the two hands of the Father,” through whom the Father creates and saves the world. The Father does not work through created instruments, like a craftsman using tools. The Father Himself works in the world through the Son and in the Holy Spirit; not through created instruments, not through intermediary powers, but through His own divine life, uncreated and undivided.
This trinitarian icon of the two hands is not merely a pious expression. In the light of Nicaea, the Church would confess that these two “hands” are not created powers, but the Son and the Spirit, inseparable from the Father, consubstantial with Him.
At Saint Irenaeus we already find, in seed, all that the later Fathers would unfold: the unity of the Trinity in action, the distinction of the Persons, the confession that God does not remain closed in Himself, but reveals Himself through the economy of salvation — the Father sends, the Son becomes incarnate, the Spirit sanctifies.
III. Saint Athanasius the Great: the Trinity without beginning, without addition
The fourth century brought the hour of trial. Arius, a presbyter from Alexandria, taught that the Son is a creature — the first and highest, but a creature nonetheless. “There was when He was not” — this was the Arian formula. Had it triumphed, Christianity would have become a monotheistic religion with a created savior — that is, with no savior at all.
Saint Athanasius the Great, the bishop of Alexandria, stood against this error for fifty years. He was driven from his see five times, spent seventeen years in exile, but did not yield one iota from the confession of Nicaea: the Son is consubstantial (homoousios) with the Father.
In Orations Against the Arians, Saint Athanasius shows the consequence which the Arians did not see: if the Son began to exist at some point, then the Trinity Itself began to exist at some point. But then God would not have been the Trinity from eternity — He would have been alone first, then become the Trinity by addition. This is impossible. “The Trinity is not made, but is eternal; and if It was not from eternity, neither is It now,” writes Saint Athanasius.
The argument of Athanasius goes further: the name of Son does not come from will, but from being. The Father did not at some moment will to have a Son, like a man who chooses to have children. The Father begets the Son from His own being, from eternity, without beginning and without end. The Son does not receive divinity through participation, as creatures receive grace. The Son is God by nature, consubstantial with the Father, without beginning, without end, without addition.
The same confession Saint Athanasius extends concerning the Holy Spirit in the Letters to Serapion: the Spirit is not a creature, but true God, consubstantial with the Father and with the Son. Thus the whole Trinity is affirmed as without beginning, uncompounded, undivided.
IV. Saint John the Evangelist: the Trinity in revealed Love
The first Theologian of the Church is the beloved disciple who leaned upon the breast of the Lord. The title of “Theologian” was given to him not for systematic teaching, but for the vision he received of the Word who is before the ages.
The Prologue: the eternal Word
“In the beginning was the Word, and the Word was with God, and the Word was God.” (John 1:1)
Saint John does not begin with a teaching about the Trinity. He begins with a vision. The Word was with God — that is, distinct from the Father as Hypostasis. The Word was God — that is, consubstantial with the Father. And the Word became flesh — that is, this God who is distinct from the Father and consubstantial with Him entered into history.
Saint Athanasius the Great, in Orations Against the Arians, would ground all his defense of Orthodoxy upon these words of John. If the Word “was God,” then the Word is not a creature. If He is not a creature, He is consubstantial with the Father. And if He is consubstantial with the Father, then there is in God a plurality of Hypostases without a plurality of beings. This is the Trinity — not a speculation, but the direct consequence of the Johannine Prologue.
The High Priestly Prayer: the communion of the Trinity revealed
In the seventeenth chapter of the Gospel, Saint John gives us the prayer which the Lord uttered to the Father before His Passion. There is revealed something which no dialectic can attain: that the Son was in the glory of the Father “before the world was” (John 17:5), and that this shared glory is the foundation of the unity of the disciples — “that they all may be one, as You, Father, are in Me, and I in You” (John 17:21).
The Trinity is not a divine solitude in three aspects. The Trinity is eternal communion. The Father is in the Son, the Son is in the Father, and the Holy Spirit proceeds from the Father. This is the divine life itself.
“God is love”
In the First Epistle, Saint John utters the word which sums up all his theology: “God is love” (1 John 4:8). Not “God has love.” Not “God acts with love.” But God is love — that is, in His very being God is communion.
This word cannot be spoken of a solitary god. The saying “God is love” does not describe a divine solitude, but the eternal life of communion of the Father, the Son, and the Holy Spirit. Saint John does not say this by way of demonstration — he sees it, for he leaned upon the breast of incarnate Love.
V. Saint Gregory of Nazianzus: the Trinity in apophatic Light
The second Theologian of the Church is the bishop of Constantinople who stood against the Eunomians and Macedonians at the end of the fourth century, preparing the Second Ecumenical Council. The five Theological Orations (27–31) are the unsurpassed summit of Orthodox trinitarian theology.
The Monarchy of the Father
For Saint Gregory, as for all the Eastern Fathers, the beginning of the Trinity is not an abstract common being, but the Person of the Father. The Father is the source without source of divinity. The Son is born of the Father before all ages. The Holy Spirit proceeds from the Father.
This order — which the Fathers call taxis — does not introduce any subordination in being. The Son is not lesser than the Father, and the Spirit is not lesser than the Son. All Three are consubstantial, always together, always equal. But the Father remains the source.
The hypostatic distinction
The Father is unbegotten. The Son is begotten. The Holy Spirit proceeds. These three properties — agennēsia, gennēsia, ekporeusis — are the only things which distinguish the Persons among Themselves. In all else, whatever the Father has, the Son also has, and the Spirit also has: the same being, the same glory, the same power, the same kingdom.
Saint Gregory firmly rejects any attempt to explain the begetting of the Son or the procession of the Spirit. “You have heard of begetting? Do not inquire into the manner. You have heard of procession? Do not trouble yourself to learn how.” Apophatic knowledge is not the absence of knowledge, but the silence proper before the Mystery.
One being, three Hypostases
Here the Holy Cappadocians enter with the language which the Church received through them. Before them, the Greek words ousia and hypostasis were nearly synonymous — both meant “being,” “concrete reality.” For this reason, when some spoke of “three hypostases” in God, others suspected them of tritheism (that they were teaching three Gods); and when others spoke of “one hypostasis” in God, the first suspected them of Sabellianism (that they were teaching one God with three names or three masks). They were speaking the same faith, but with different words, and they condemned one another.
Saint Basil the Great did the work of separating the two words and giving each its own meaning. Ousia came to designate what is common — the being, the nature, divinity itself. Hypostasis was reserved for what is proper to each Person — Her mode of being, Her hypostatic property. Thus the Orthodox confession could be uttered without ambiguity: in God there is one being (mia ousia) and three Hypostases (treis hypostaseis). The one does not cancel the other.
To make this mystery intelligible, the Fathers sometimes used the comparison of three men — Peter, Paul, and John — who share the same human nature, yet are three distinct persons. The comparison helps, but it limps, and the Holy Fathers warn: in the case of human beings, the common nature is an abstraction — Peter, Paul, and John are separated in their bodies, in their wills, in their actions. In God, the being is not an abstraction, but a living and undivided reality; and the Three Hypostases are not separated, but interpenetrate perfectly. For this reason we say “one God,” not “three,” even while we confess three Persons.
Saint Gregory of Nyssa strengthened this confession in his letter To Ablabius: That There Are Not Three Gods. His argument begins from action. Among men, several physicians heal, each through his own action — even if they do the same thing, they are three distinct actions. With God it is not so. When the Father, the Son, and the Holy Spirit act — whether in the creation of the world, in salvation, or in the sanctification of man — there are not three parallel actions, but a single action which proceeds from the Father, advances through the Son, and is brought to completion in the Holy Spirit. And where the action is one, there the nature is also one.
For this reason, Saint Gregory of Nyssa teaches, God is not three, but one — for His action is one, His will is one, His glory is one. The Persons are three, but They do not divide the nature among Themselves, nor do They separate in action. They are one in a manner which no created comparison can encompass.
This terminology was not the invention of the Cappadocians. It was the illumination which the Spirit gave to the Church through their life of asceticism and confession. Saint Basil fasted, kept vigil, served the poor, and stood firm against the Arian pressures of his time; Saint Gregory of Nyssa followed his brother in the same asceticism. Their language was born of their life.
The divinity of the Holy Spirit
The Fifth Theological Oration (the thirty-first) is the decisive defense of the divinity of the Holy Spirit against the Macedonians, who held Him to be a creature. Saint Gregory shows that Scripture, through her whole economy, bears witness to the Spirit as God: the Spirit is the One who sanctifies, the One who gives life, the One who dwells in the saints, the One who proceeds from the Father. None of these can be said of a creature.
Saint Basil, in On the Holy Spirit, strengthens this word through the liturgical argument: the Church glorifies the Spirit together with the Father and the Son in Baptism, in the Liturgy, in the doxology. If the Church worships Him as God, then He is God — for the Church does not worship creatures.
VI. Saint Maximus the Confessor: the Trinity as the paradox of union
The seventh century brought another hour of trial — the Monothelite controversy. Saint Maximus the Confessor defended the truth that there are two wills in Christ, divine and human, unmingled. For this confession his right hand was cut off and his tongue cut out, so that he could no longer write or speak the truth. He died in exile in the land of the Lazes.
In the Chapters on Love and in the Ambigua, Saint Maximus preserved and unfolded the Cappadocian inheritance. He utters the paradox of the Trinity in a manner which only vision can grasp: “God is divided, yet indivisibly… He is united in a divided manner. For this reason, both division and union are a paradox.”
And Saint Thalassius, the disciple and friend of Saint Maximus, sums up the same mystery: “The Monad moving toward the Triad remains the Monad; and the Triad brought back to the Monad remains the Triad.” This is not a movement in time — the Trinity did not “become.” It is the divine life itself, in which the unity of the being and the distinction of the Persons coexist eternally, without the one canceling the other.
For Saint Maximus, the Trinity is both the source and the goal of the spiritual life. The mind purified through ascesis first sees the principles (logoi) of created things, then ascends through them to the Word (Logos), and through the Word reaches the knowledge of the Father in the Holy Spirit. This is not a dialectical ascent, but an ascent through grace, in which each step is a gift of the Trinity Herself.
VII. Saint John of Damascus: the Trinity as the interpenetration of the Persons
Saint John of Damascus, in the eighth century, synthesized in On the Orthodox Faith (Book I) the whole patristic inheritance concerning God. The manner in which he did so is the very example of Orthodox systematization: he says nothing of his own. Each chapter is woven from the teaching of the earlier Fathers — Athanasius, the Cappadocians, Dionysius, Maximus. Saint John of Damascus does not put Tradition into his own voice; he puts his voice into the service of Tradition. This is the difference between the theologian of the Church and the academic author.
From Saint John of Damascus the Church received the classical formulas of trinitarian theology. He grounds perichoresis — the interpenetration of the Persons — upon the very word of the Lord: “I am in the Father, and the Father in Me” (John 14:10). In On the Orthodox Faith, Saint John writes:
“The hypostases of the Holy Trinity are united, not in the sense that they are mingled, but in the sense that they exist in one another; and the mutual interpenetration of the hypostases is without confusion and without mingling. (…) For this reason we do not say that the Father and the Son and the Holy Spirit are three Gods, but, on the contrary, that the Holy Trinity is one God.”
And further: “There is in Them unity and identity of movement, for the three hypostases have a single impulse and a single movement, a thing which cannot be seen in created nature.”
This is the vision of Saint John of Damascus: the Father is in the Son, the Son is in the Father, the Spirit is together with the Father and the Son, He rests in the Son and shines forth through the Son, but proceeds hypostatically from the Father alone. The three Persons are one not through fusion, but through interpenetration; Their action is one, Their will is one, Their glory is one.
VIII. Saint Symeon the New Theologian: the Trinity as Light beheld
The third Theologian of the Church lived in the tenth and eleventh centuries, at the monastery of Saint Mamas in Constantinople. Unlike Saint Gregory of Nazianzus, who theologized against heresy, Saint Symeon theologized from direct vision.
Uncreated Light as the vision of the Trinity
In the Hymns of Divine Love and in the Catecheses, Saint Symeon bears witness that he beheld God as Light. This is not a poetic metaphor. It is the uncreated light of the Trinity, the same light which the Apostles saw on Tabor and which Moses saw on Sinai.
In Hymn 22, the Light Himself speaks to Saint Symeon and reveals His nature:
“Believe therefore that I am a light without form, wholly simple, uncompounded, indivisible by nature, inscrutable, approachable in an unapproachable manner; for I truly allow Myself to be seen, I show Myself with love for mankind, changing My form according to the powers of each man; I do not suffer this change, but those who are deemed worthy to see Me thus, for otherwise they could not, nor could they attain to more.”
This vision is not separated from the Trinity, but is the very vision of the Trinity: in the Light of the Spirit, Symeon beholds the Son, and through the Son knows the Father. “He who has seen Me has seen the Father” (John 14:9) — the word of the Lord to Philip is for Symeon the exact description of his own experience.
The indwelling of the Trinity in man
For Saint Symeon, the vision of the Trinity is not a beholding from without, but an indwelling from within. He writes in the Theological and Practical Chapters:
“He who has My commandments and keeps them, he it is who loves Me” (John 14:21). And so we add ascesis upon ascesis to show our love through deeds. And when this happens, He Himself loves us, as He has promised. And in loving us, His Father loves us likewise, and the Spirit comes forth, who adorns our house, so that through the meeting of the hypostases in us, we become a dwelling of the Father, of the Son, and of the Holy Spirit.”
This is the stern witness of Saint Symeon, for which he was held under suspicion in his own time: that true theology is not a teaching transmitted from books, but a life received through grace. The man who does not feel the Spirit within himself, he writes severely, is baptized, but does not live his Baptism.
And the indwelling of the Trinity is not the end of the search, but the beginning of a greater longing. Saint Symeon writes:
“The indwelling of the Divinity in three hypostases — in those who are perfect, known and felt in purity — is not the fulfillment of desire, but rather the beginning and cause of a stronger desire. For from that moment on, it no longer permits the one who has received it to grow calm, but, holding him ever inflamed as by a fire, drives him to rise toward the flame of an even more divine desire.”
IX. Saint Gregory Palamas: the Trinity known through the energies
The fourteenth century brought the final great clarification which the Church received concerning the knowledge of the Trinity. Barlaam of Calabria, trained in the manner of the Western scholastics, attacked the hesychast practice of beholding the uncreated light, maintaining that God cannot be known in His being, and that the light which the monks beheld was a creature.
Saint Gregory Palamas, the archbishop of Thessalonica, answered through the Triads in Defense of the Holy Hesychasts and through the One Hundred and Fifty Chapters. He showed that between the being of God and His actions (energies) there is a real distinction, but not a separation. The being remains unknown and uncontainable for any creature; the energies are uncreated, are God Himself going forth toward the world, and are accessible to those who have been purified.
Saint Gregory writes in the Triads concerning the light which the Apostles saw on Tabor: “By His supernatural power, God remains wholly in Himself, yet dwells wholly in us; and He communicates to us not from His own being, but from His own glory and radiance.”
This distinction is not a scholastic subtlety. It is the defense of the very possibility of deification. If the vision of God meant participation in His being, then man would become God by nature — which is impossible. If the vision were merely the symbol of a created light, then the saints would not truly see God. The essence-energies distinction preserves both: God remains uncontainable, yet truly gives Himself.
Thus the arc of Eastern trinitarian theology closes: from Irenaeus who confessed the two hands of the Father, to Athanasius who defended consubstantiality, to the Cappadocians who fixed the language of ousia/hypostasis, to Maximus and the Damascene who preserved the synthesis, to Symeon who beheld the Light, to Palamas who clarified how it is beheld. Not an evolution of doctrines, but a single confession unfolded in time.
X. The Trinity in the life of the Church
The Three Theologians did not theologize in isolation. They bore witness to what the Church was living liturgically.
The Trinity is confessed in the Creed: I believe in one God, the Father Almighty; and in one Lord Jesus Christ, the Son of God, begotten of the Father before all ages; and in the Holy Spirit, the Lord, the Giver of Life, who proceeds from the Father.
The Trinity is invoked in Baptism: in the name of the Father and of the Son and of the Holy Spirit. This formula, given by Christ Himself, is the foundation of all trinitarian theology. Whoever is not baptized in the name of the Trinity is not baptized into Christ.
The Trinity is glorified in doxology: glory to the Father and to the Son and to the Holy Spirit, both now and ever and unto the ages of ages. This doxology concludes every prayer, every psalm, every service. The Church cannot breathe without the trinitarian doxology.
The Trinity is beheld in the icon: the icon of the Holy Trinity, depicting the three angels received by Abraham at the oak of Mamre, is the image through which the Church has shown the unity in communion of the Persons. The Three are equal, are gathered around a table, are turned toward one another in love.
The Trinity is celebrated at Pentecost, when the Holy Spirit descended and completed the revelation: the Father made Himself known in the Old Covenant, the Son was manifested at the Incarnation, the Spirit descended at Pentecost. The economy of the Trinity is completed; it remains for us to enter into Her.
XI. The Trinity confessed in prayer
The Fathers did not teach the Church to theologize. The Church taught them. Trinitarian dogma was not born in lecture halls, but in doxology; not in treatises, but in the calling upon the name of the Father and of the Son and of the Holy Spirit. And what the Fathers bore witness to with ink and with blood, the Church utters day by day through the mouth of the faithful at prayer.
This is clearly seen in liturgical prayer. The Akathist of the Holy Trinity, one of the best-known prayers addressed to the Trinity in the Eastern Tradition, confesses Cappadocian dogma in its most lucid form. The faithful, without ever having read the Five Theological Orations, utters exactly what Saint Gregory of Nazianzus taught: that the Father and the Son and the Holy Spirit are equally uncreated, but are not three distinct uncreated beings; that in the Trinity there is “one Godhead in the Father and in the Son and in the Holy Spirit, equal in power, of one being in glory”; and that the Father is the One who has begotten the Son before all ages, the Son is the One begotten of the Father without time, and the Holy Spirit proceeds from eternity from the Father, but is not begotten.
This is no coincidence. The Akathist was composed by the Fathers of the Church precisely so that dogma might be breathed rather than memorized. Whoever utters these words with reverence does not receive information, but enters into the confession of the Church. And the confession of the Church is the confession of the Fathers, who in turn is the confession of the Apostles, who in turn is the confession of the Lord Himself: “Baptizing them in the name of the Father and of the Son and of the Holy Spirit” (Matthew 28:19).
This continuity is the work of the Spirit in the Church. Saint Basil the Great showed in On the Holy Spirit that the prayer of the Church is the criterion of dogma: if the Church worships the Spirit together with the Father and the Son, then the Spirit is God. The written word of the Fathers confirms what liturgical life already bore witness to. The Akathist of the Holy Trinity is not a theological novelty — it is the voice of the faithful through whom all Tradition speaks.
For this reason, the one who would enter into the Mystery of the Trinity has no need to study dogmatic treatises before he prays. He needs to pray; and the dogma comes through prayer, placed in the heart by the Holy Spirit, through the mouth of the Church.
XII. Conclusion: to enter, not to understand
A return to the word of Saint Gregory the Theologian: no sooner do I think of the One than I am encompassed by the splendor of the Three. And this movement is not of the mind, but of the purified heart. Saint John the Evangelist leaned upon the breast of the Lord; Saint Gregory the Theologian fasted and kept vigil in the wilderness of Pontus; Saint Symeon the New Theologian prayed until he beheld the Light. None of them came to the Trinity through syllogism. All of them came through their life.
And Saint Athanasius stood in exile for seventeen years; Saint Maximus the Confessor lost his right hand and his tongue; Saint Gregory Palamas was imprisoned for years for the defense of the uncreated light. The theology of the Trinity is not a construction of the mind. It is a vision paid for at the price of life, transmitted from confessor to confessor, preserved in the Church through blood.
Let the reader who has followed these lines not depart with the impression that he now “knows” more about the Trinity. Let him depart with the longing to enter. And entry is made through prayer, through the Liturgy, through Baptism lived consciously, through life in the Church. The Trinity is not learned as a lesson. The Trinity is received as a gift.
And the one who has received the gift does not stop. As Saint Symeon bears witness, the indwelling of the Trinity in man is not the fulfillment of desire, but the beginning of a stronger desire. The Trinity cannot be encompassed — neither here, nor in the age to come. The saints shall go from glory to glory, unto the ages.
“Then shall I know, even as also I am known” (1 Corinthians 13:12). Until then — worship, confession, longing.
Principal sources: Saint John the Evangelist — the Gospel, the First Epistle, the Apocalypse. Saint Irenaeus of Lyons — Against Heresies. Saint Athanasius the Great — Orations Against the Arians, Letters to Serapion. Saint Basil the Great — On the Holy Spirit, Against Eunomius. Saint Gregory of Nyssa — To Ablabius, Against Eunomius. Saint Gregory the Theologian — The Five Theological Orations (27–31), Oration on Holy Baptism (40). Saint Maximus the Confessor — Ambigua, Chapters on Love. Saint Thalassius — Chapters on Love. Saint John of Damascus — On the Orthodox Faith (Book I). Saint Symeon the New Theologian — Hymns of Divine Love, Catecheses, Theological and Practical Chapters (225). Saint Gregory Palamas — Triads in Defense of the Holy Hesychasts, One Hundred and Fifty Chapters.