Theopedia

Gregory of Nyssa

This truly is the vision of God: never to be satisfied in the desire to see him. But one must always, by looking at what he can see, rekindle his desire to see more.1

Overview

Gregory of Nyssa (c. 335-c. 395) was bishop of Nyssa in Cappadocia and one of the three Cappadocian Fathers, along with his elder brother Basil of Caesarea and Gregory of Nazianzus, credited with shaping the doctrine of the Trinity that became orthodox teaching.2 He is best known for his argument, in Ad Ablabium (“On Not Three Gods”), that Father, Son, and Spirit share one common divine nature, and for his teaching that the Christian life is an unending ascent toward an infinite God, a doctrine later called epektasis.31

Life and Ministry

Gregory was born around 335 or 336 in Caesarea, Cappadocia, the son of Basil the rhetorician, who died while Gregory and his siblings were still young.4 He was the younger brother of Basil of Caesarea and of Macrina, whose influence pressed him toward a more ascetic and monastic life than his early career as a rhetorician had suggested.4 Whether Gregory married a woman named Theosebeia is disputed among his own biographers; the editors of his collected letters concluded that “no allusion to Theosebeia as his wife, and no letter to her, is to be found in Gregory’s numerous writings.”4

Around 371, Basil, by then metropolitan of Caesarea, “obliges his brother Gregory, in spite of his emphatic protest, to undertake the Bishopric of Nyssa.”4 The appointment did not go smoothly. In 376 a regional synod aligned with the Arian party brought charges of embezzlement and irregular ordination against him, “pronounced [him] contumacious, and deposed from his Bishopric,” after which the emperor issued “a decree of banishment.”4 Gregory retired to Seleucia under what his own biographers describe as “much bodily discomfort and suffering” before being restored to his see in 378.4

Gregory took part in the Synod of Antioch in 379 and was among the 150 bishops Emperor Theodosius summoned to the Council of Constantinople in 381, where he delivered the council’s inaugural address.4 He continued serving as bishop of Nyssa for over a decade afterward; his last documented appearance is at a synod in 394, and his death is usually placed the following year.4

Theological Contribution

The Trinity: Ad Ablabium and divine simplicity

Gregory’s Ad Ablabium, written to answer the objection that confessing Father, Son, and Spirit as three distinct persons amounts to confessing three gods, argues that the persons are known through their shared operations rather than through any difference in nature.5 “Godhead signifies operation, not nature,” and since Father and Son “co-operate” in every action, there is no distinction in their nature, only in their causal relations to one another.3 For those who insisted that “Godhead” must still name a nature and not only an activity, Gregory offered a second argument from ordinary counting: gold coins, however numerous, are never called “many golds” because the substance counted is one. Peter, James, and John are likewise three individuals who share a single common humanity, and it is this reasoning about a shared nature, not an analogy of three separate individuals, that Gregory applies to the Trinity.6 Patristic scholarship remains divided over how far this “three men” analogy can be pressed without implying tritheism, a use to which some later “social” doctrines of the Trinity have put it.7

Stephen Holmes observes that Gregory’s whole argument in Ad Ablabium presupposes divine simplicity without ever naming it: “Throughout this treatise Gregory assumes, without naming, the concept of divine simplicity… It is precisely his belief in divine simplicity that enables him to defend Trinitarian theology.”8

Gregory’s contribution to the Cappadocian settlement extended to its vocabulary as well as its arguments. The Cappadocians supplied hypostasis as the Greek term for what the Trinity is three of, functioning in the East the way persona did in the Latin-speaking West, and are, as a group, “largely responsible for the language that was to be adopted as the orthodox expression of the Trinity.”2 “Letter 38,” which distinguishes ousia (“essence”) from hypostasis by comparing a noun naming a common nature (such as “mankind”) to one naming a particular individual (such as “Paul” or “Timothy”), has traditionally been printed among Basil’s letters, but is sometimes attributed to Gregory of Nyssa instead; a 1944 thesis by Anders Cavallin argued for Gregory’s authorship, and “it seems patristic scholars generally agree.”9

Divine infinity against Eunomius

Gregory also wrote against Eunomius, who held that God’s essence was fully expressed and comprehended in the single title “Unbegotten.” Where Eunomius argued that using more than one name for God’s essence would compromise divine simplicity, the Cappadocian response, in Gregory’s own version, held instead that God is boundless: “the argument for God being boundless is central and relates to Gregory’s of Nyssa’s more popular argument against Eunomius that God’s nature is unknown because it is infinite.”10 On this argument, no single term, including “Unbegotten,” can exhaust the being of a God who has no limit for human language to reach.

Epektasis: perpetual ascent and the vision of God

Gregory’s short treatise The Life of Moses, written in answer to a request for guidance on the Christian life, reads the whole span of Moses’s story, from Exodus to his death in Deuteronomy, as a figure for the soul’s pursuit of God.11 Its most striking claims concern Moses’s ascent in Exodus 33: the soul, “made to desire and not to abandon the transcendent height by the things already attained, makes its way upward without ceasing,” so that even a soul “lifted up through such lofty experiences” remains, in Gregory’s words, “still unsatisfied in his desire for more.”12 Because God is infinite, Gregory holds that no finite creature’s vision of him can ever reach a final, static end; the vision itself consists in the unending renewal of desire, not in its satisfaction:

This truly is the vision of God: never to be satisfied in the desire to see him. But one must always, by looking at what he can see, rekindle his desire to see more.1

For Gregory this endless ascent, later called epektasis after the “reaching forward” of Philippians 3:13, is explicitly centered on Christ: “since Christ is understood by Paul as the rock, all hope of good things is believed to be in Christ… He who finds any good finds it in Christ, who contains all good.”13

Historical Significance

Gregory belonged to the generation of bishops who carried the Nicene cause through the decades after the Council of Nicaea (325) to its confirmation at Constantinople (381), where the creed recited today received its developed statement on the Holy Spirit.14 Alongside Basil and Gregory of Nazianzus, his work supplied the Trinitarian grammar, particularly the distinction between ousia and hypostasis, that the wider church adopted as orthodox.2 His treatise On Not Three Gods continues to be recommended as a primary text for the doctrine of the Trinity that the Cappadocians as a group secured against Eunomian and Pneumatomachian denial of the full deity of the Son and Spirit.15

Related Doctrines

Gregory’s Trinitarian argument bears directly on the doctrine of the Trinity and stands opposed to Arianism, the Eunomian position his Ad Ablabium and other writings answered. His teaching on the soul’s perpetual ascent toward God relates to the Eastern Orthodox doctrine of theosis. See also his brother Basil of Caesarea and Gregory of Nazianzus, the other two Cappadocian Fathers.

References

  1. Samuel G. Parkison, To Gaze upon God: The Beatific Vision in Doctrine, Tradition, and Practice (Downers Grove, IL: IVP Academic, 2024), 69, quoting Gregory of Nyssa, The Life of Moses. ↩ ↩2 ↩3

  2. Darron Thomas Chapman, “Formulations of the Concept of Person Prior to Boethius,” in “The Concept of Person in Christian Theology: An Exposition and Defense of a Classical Boethian/Thomistic Definition of Person” (PhD diss., The Southern Baptist Theological Seminary, 2026), 50. ↩ ↩2 ↩3

  3. Keith Wesley Goad, “Gregory’s Grammar for the Trinity,” in “Trinitarian Grammars: A Comparison of Gregory of Nazianzus and Some Contemporary Models” (PhD diss., The Southern Baptist Theological Seminary, 2010), 121-22. ↩ ↩2

  4. Philip Schaff and Henry Wace, eds., “A Sketch of the Life of S. Gregory of Nyssa,” Prolegomena to Gregory of Nyssa: Dogmatic Treatises, Etc., Nicene and Post-Nicene Fathers, 2nd series, vol. 5 (1893; public domain), https://www.ccel.org/ccel/schaff/npnf205.vii.i.html. ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8

  5. Goad, “Gregory’s Grammar for the Trinity,” in “Trinitarian Grammars,” 121. ↩

  6. Goad, “Gregory’s Grammar for the Trinity,” 122. ↩

  7. Goad, “Gregory’s Grammar for the Trinity,” 122, citing Lewis Ayres, “On Not Three People: The Fundamental Themes of Gregory of Nyssa’s Trinitarian Theology as Seen in To Ablabius: On Not Three Gods,” in Rethinking Gregory of Nyssa, ed. Sarah Coakley (Oxford: Blackwell, 2003), 15-44. ↩

  8. Stephen R. Holmes, The Quest for the Trinity: The Doctrine of God in Scripture, History and Modernity (Downers Grove, IL: IVP Academic, 2012), 108, quoted in Daniel David Scheiderer, “Trinity and an Eternal Covenant,” in “Eternal Covenant: The Trinitarian Shape of an Historic Baptist Doctrine” (PhD diss., The Southern Baptist Theological Seminary, 2022), 96-97. ↩

  9. Chapman, “Formulations of the Concept of Person Prior to Boethius,” 51n21. ↩

  10. Goad, “Gregory the Grammatical Theologian,” in “Trinitarian Grammars,” 40. ↩

  11. Parkison, To Gaze upon God, 66. ↩

  12. Parkison, To Gaze upon God, 68-69, quoting Gregory of Nyssa, The Life of Moses. ↩

  13. Parkison, To Gaze upon God, 69-70, quoting Gregory of Nyssa, The Life of Moses. ↩

  14. Ronald E. Heine, Classical Christian Doctrine: Introducing the Essentials of the Ancient Faith (Grand Rapids, MI: Baker Academic, 2013), 90. ↩

  15. Heine, Classical Christian Doctrine, 103. ↩