Irenaeus of Lyons on the Trinity
Trinitarian in substance but pre-Nicene and terminologically undeveloped
"God, the Father... this is the first point of our faith. The second point is: The Word of God, Son of God, Christ Jesus our Lord... The third point is: The Holy Spirit." — Demonstration of the Apostolic Preaching 6 (trans. J. Armitage Robinson, via CCEL
THE POSITION
The Demonstration of the Apostolic Preaching opens with one of the clearest pre-Nicene statements of the Father/Son/Spirit structure in the whole patristic corpus — three named 'points' of the rule of faith: the Father, uncreated and maker of all; the Word/Son, through whom all things were made and who became man; and the Holy Spirit, through whom the prophets spoke and who was poured out at Pentecost. No homoousios vocabulary or person/substance apparatus — Word and Wisdom are identified with Son and Spirit through Psalm 33:6 and 1 Corinthians 8:6 rather than later metaphysical categories. The Son's eternity is affirmed narratively: he 'did not then begin to exist, being with the Father from the beginning.'
6 By the word of the LORD the heavens were made, and all the stars by the breath of His mouth.
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ABOUT THIS FIGURE
Bishop of Lyons, author of Against Heresies. Argued against Gnosticism from the apostolic rule of faith, and framed salvation as Christ recapitulating human life.
Cite this page
"Irenaeus of Lyons on the Trinity", Examined Doctrine, July 2026 edition, https://examineddoctrine.com/position/irenaeus/trinity (archived at https://examineddoctrine.com/editions/2026-07/position/irenaeus/trinity).