Development of Trinitarian theology

Definition

The development of Trinitarian theology traces how the church moved from the New Testament’s own triadic language for God to the settled dogmatic formulation of one God in three persons, of one substance, reached at the Council of Nicaea (AD 325) and elaborated by the theologians who followed it.¹

Historical Development

Even before any formal doctrine existed, the earliest Christian writings already speak of Father, Son, and Spirit together. Ignatius of Antioch, writing early in the second century, exhorts one church to be established “in faith and love; in the Son, and in the Father, and in the Spirit.”² Such triadic language reflects the New Testament’s own pattern — baptism “in the name of the Father and of the Son and of the Holy Spirit” (Matt. 28:19) — without yet working out how three could be named alongside the church’s inherited Jewish monotheism.

That working-out produced real tension before it produced clarity. Origen, in the third century, described the Father with titles implying deity in the fullest, underived sense — “God of himself,” the very “root of deity” — while reserving for the Son the lesser title “God” without the definite article, language that could be read, and later was read, as making the Son a lesser, derived deity rather than fully God in the same sense the Father is.¹

The Council of Nicaea in AD 325 rejected this subordinationist reading and affirmed the Son as of one substance with the Father, reversing the shape of the church’s own difficulty: “before Nicaea the main difficulty was to derive a threesome from the oneness of God; after Nicaea the reverse is true.”¹ Elaborating, developing, and completing the doctrine that Nicaea had only affirmed in its essentials fell to the theologians who followed: Athanasius, who spent much of his life defending Nicaea’s judgment against continued Arian resistance; the three Cappadocian fathers, who supplied much of the doctrine’s settled technical grammar for how one divine essence and three distinct persons relate; and Augustine in the West, whose own treatment shaped Western Trinitarian theology for centuries after him.¹

Related Doctrines

• Trinity
• Trinitarian theology
• First Council of Nicaea
• Nicene Creed
• Arianism
• Athanasius
• Cappadocian Fathers
• Homoousios

References

1. Herman Bavinck, Reformed Dogmatics: Abridged in One Volume, ed. John Bolt (Grand Rapids: Baker Academic, 2011), chap. 9, “The Triune God and His Counsel.” ↩ ↩² ↩³ ↩⁴

2. Ignatius of Antioch, Epistle to the Magnesians, chap. 13, in Ante-Nicene Fathers, vol. 1, text as reproduced by New Advent. ↩