The Trinity Perfected

St. Gregory the Theologian’s Trinitarian achievement: the monarchy of the Father held together with the full equality of the three persons, the relations of origin (unbegotten, begotten, proceeding) as the only distinctions within the Godhead, and the explicit confession of the Holy Spirit as God and consubstantial — the step Nicaea had not yet taken. This file traces the doctrine through the Five Theological Orations and Oration 40, and shows why the Creed completed at Constantinople in 381 moves in the channel Gregory cut.

Tradition: Pan-Orthodox (Church Father)

Why “the Theologian”

In the Orthodox Church only three persons bear the title ho Theologos, “the Theologian”: St. John the Evangelist, St. Symeon the New Theologian, and Gregory of Nazianzus. Gregory earned it by a single short body of work — the Five Theological Orations (Orations 27–31), delivered in Constantinople in 380 — together with the festal orations that surround them. These are, by wide scholarly consent, the most influential patristic texts on the doctrine of the Trinity (Beeley, Gregory of Nazianzus on the Unity of Christ; the Theological Orations are treated as the centre of his thought in McGuckin, St. Gregory of Nazianzus: An Intellectual Biography, ch. 6). What earlier Fathers had defended in fragments and under fire, Gregory drew into a single luminous confession.

The Monarchy of the Father with Full Equality

Gregory inherited from the Cappadocian synthesis the principle that secures the unity of God: the monarchy of the Father (monarchia tou Patros). The Father alone is the source, cause, and principle of the Godhead; the Son and the Spirit derive their being from him. But Gregory’s distinctive contribution was to hold this monarchy in perfect balance with the equality of the persons, so that derivation never slides into subordination.

“To us there is one God, for the Godhead is one, and all that proceeds from him is referred to one, though we believe in three persons. For one is not more and another less God; nor is one before and another after… the three are one in Godhead, and the one three in properties.” (Gregory the Theologian, Oration 31 [Fifth Theological Oration] 14; trans. NPNF II/7)

The Father is the cause (aitia), but a cause of equals: “When did these come into being? They are above all ‘when.’ But, if I am to speak with something more of boldness, when the Father did” (Oration 31 14; trans. NPNF II/7). The Son’s begetting and the Spirit’s procession are eternal, beginningless, timeless. Thus the Father is not greater in nature — the very word would reintroduce Arianism — but is the personal origin from whom the Son and Spirit have, eternally and without diminution, the one whole Godhead. This is why Orthodox theology grounds the unity of God not in an abstract shared essence but in the person of the Father (see The Holy Trinity).

The Relations of Origin as the Only Distinctions

For Gregory the three persons are distinguished by nothing in the divine nature — which is one, undivided, and wholly possessed by each — but solely by the relations of origin: how each stands to the Father as source.

“The proper name of the Unoriginate is Father, and that of the unoriginately Begotten is Son, and that of the unbegottenly Proceeding or going forth is the Holy Ghost.” (Gregory the Theologian, Oration 30 [Fourth Theological Oration] 19; trans. NPNF II/7)

The Father is unbegotten (agennētos); the Son is begotten (gennētos); the Spirit proceeds (ekporeuetai). These three — ingeneracy, generation, procession — are the only differentiae, and they say nothing about what God is, only about how each person is from the Father. Gregory is emphatic that the mode of the difference between the Son’s generation and the Spirit’s procession is beyond all comprehension:

“What then is Procession? Do you tell me what is the Unbegottenness of the Father, and I will explain to you the physiology of the Generation of the Son and the Procession of the Spirit, and we shall both of us be stricken with madness for prying into the mystery of God.” (Gregory the Theologian, Oration 31 8; trans. NPNF II/7)

To press past the that of the relations to the how is, for Gregory, not theology but presumption. The distinctions are real, eternal, and constitutive of the persons; their inner mode is reserved to God alone.

“Encircled by the Splendour of the Three”

Gregory’s most quoted sentence — the heartbeat of his whole Trinitarian vision — comes from the festal Oration on Holy Baptism. It expresses the simultaneity of unity and trinity in the act of contemplation itself: the mind cannot rest in the One without being drawn to the Three, nor distinguish the Three without being borne back to the One.

“No sooner do I conceive of the One than I am illumined by the Splendour 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, and the greater part of what I am thinking of escapes me. I cannot grasp the greatness of That One so as to attribute a greater greatness to the Rest. When I contemplate the Three together, I see but one torch, and cannot divide or measure out the Undivided Light.” (Gregory the Theologian, Oration 40 [On Holy Baptism] 41; trans. NPNF II/7)

The “one torch” and “undivided light” are not metaphors of vagueness but of co-equality: a single flame, not three, yet a flame that is genuinely Father, Son, and Spirit. This is the via media Gregory cut between the two errors he names again and again — the tritheism that would divide the one Light into three, and the Sabellian modalism that would collapse the Three into a nameless One. “I should like to call the Father the greater,” he writes, “because from Him flows both the Equality and the being of the Equals… but I am afraid to use the word Origin, lest I should make Him the Origin of Inferiors” (Oration 40 43; trans. NPNF II/7).

“The Spirit is God”: Completing What Nicaea Began

The decisive advance is on the Holy Spirit. The Creed of Nicaea (325) had confessed the Son homoousios with the Father but said of the Spirit only “and in the Holy Spirit,” with no qualification. Two generations later the divinity of the Spirit was still contested by the Pneumatomachi (“Spirit-fighters,” also called Macedonians), who granted the Son’s divinity but treated the Spirit as a creature or an intermediate being. Even St. Basil the Great, in On the Holy Spirit (375), had defended the Spirit’s right to be “glorified together with” the Father and the Son and to receive equal honour, yet stopped short — for pastoral and tactical reasons — of explicitly calling the Spirit God or homoousios (Basil, On the Holy Spirit; cf. The Holy Trinity).

Gregory removed the reserve. In the Fifth Theological Oration he states the matter without flinching:

“Is the Spirit God? Most certainly. Well, then, is He Consubstantial? Yes, if He is God.” (Gregory the Theologian, Oration 31 10; trans. NPNF II/7)

And, against those who complained that Scripture nowhere calls the Spirit God in so many words, Gregory answered with his celebrated doctrine of progressive revelation — the gradual unveiling of the Trinity across the economy of salvation, each stage giving as much light as the age could bear:

“The Old Testament proclaimed the Father openly, and the Son more obscurely. The New manifested the Son, and suggested the Deity of the Spirit. Now the Spirit Himself dwells among us, and supplies us with a clearer demonstration of Himself.” (Gregory the Theologian, Oration 31 26; trans. NPNF II/7)

The Spirit’s full divinity, Gregory argues, is not a novelty but the ripening of a seed sown in Scripture and entrusted to the Church’s deepening understanding. With this, the confession of one Godhead in three coequal persons was complete: what Athanasius and Nicaea had secured for the Son, Gregory secured for the Spirit.

Why the Creed of Constantinople 381 Reflects His Theology

When the Second Ecumenical Council met at Constantinople in 381, Gregory presided over part of it and was, for a few months, bishop of the city (see Anastasia and the Council). The creed the council promulgated — the Nicene-Constantinopolitan Creed, still sung at every Orthodox Liturgy — expanded the bare Nicene article on the Spirit into a full confession of his divinity: “the Lord, the Giver of Life, who proceeds from the Father, who together with the Father and the Son is worshipped and glorified, who spoke through the prophets” (Council of Constantinople I, 381; see The Seven Ecumenical Councils).

Notably, the creed worships and glorifies the Spirit “together with” the Father and the Son — Basil’s language of co-glorification — while its whole burden is the divinity for which Gregory had argued most explicitly. The phrase “who proceeds from the Father” (to ek tou Patros ekporeuomenon), drawn from John 15:26, enshrines precisely Gregory’s distinction between the Son’s begetting and the Spirit’s procession from the one Father. Scholars caution that the council fathers did not simply transcribe Gregory’s orations, and that the creed’s reticence (it does not use homoousios of the Spirit) reflects a deliberately irenic settlement broader than any one theologian (McGuckin, St. Gregory of Nazianzus, ch. 7; Beeley, Gregory of Nazianzus on the Unity of Christ, ch. 3). But the theology the creed enshrines — one Godhead, three coequal persons, the Father as source, the Spirit fully divine and to be worshipped — is the theology Gregory had taught from the Anastasia chapel the year before. He is the council’s theological voice, even where its language is more guarded than his own.

The Apophatic Frame

Gregory’s boldness about what the Trinity is sits inside an unbroken insistence on the incomprehensibility of God. The First and Second Theological Orations (Orations 27–28) open the series not with affirmation but with a warning: theology is not for everyone, nor at every time, nor on every subject; it is for those who have been purified (Oration 27 3). And of the divine nature itself: “It is difficult to conceive God, but to define Him in words is an impossibility” (Oration 28 4; trans. NPNF II/7). The mind may ascend Sinai with Moses and enter the cloud, but it sees only “the back parts of God” — his works and energies — never the essence (Oration 28 3). Gregory’s Trinitarian confidence is therefore not rationalism; it is the confession of a mystery genuinely revealed yet never exhausted, held in the posture of worship. The doctrine of the Trinity, for Gregory, is doxology before it is definition — which is why his most precise theology is found in orations preached at the font and the feast.

References

Gregory the Theologian (of Nazianzus). The Five Theological Orations (Orations 27–31). 380. Trans. NPNF II/7 (ed. Browne and Swallow); modern trans. in Frederick Williams and Lionel Wickham, St. Gregory of Nazianzus: On God and Christ — The Five Theological Orations and Two Letters to Cledonius, Popular Patristics Series 23 (Crestwood, NY: St. Vladimir’s Seminary Press, 2002).
Gregory the Theologian. Oration 40: On Holy Baptism. Trans. NPNF II/7.
Basil the Great. On the Holy Spirit (De Spiritu Sancto). 375. Trans. NPNF II/8.
Council of Constantinople I (381). Nicene-Constantinopolitan Creed.
Beeley, Christopher A. Gregory of Nazianzus on the Trinity and the Knowledge of God: In Your Light We Shall See Light. Oxford: Oxford University Press, 2008.
Daley, Brian E. Gregory of Nazianzus. The Early Church Fathers. London and New York: Routledge, 2006.
McGuckin, John A. St. Gregory of Nazianzus: An Intellectual Biography. Crestwood, NY: St. Vladimir’s Seminary Press, 2001.