Gregory of Nazianzus (c. 329-389/390), in the first section of his second theological oration (oration 28.1):
Let us . . . [dedicate] our sermon to our sermon’s subjects, the Father, the Son, and the Holy Spirit,
that the Father may approve, the Son aid, and the Holy Spirit inspire it—
or rather that the single Godhead’s single radiance, by mysterious paradox one in its distinctions and distinct in its connectedness, may enlighten it.
Augustine of Hippo (354-430), concluding his masterpiece on the Trinity (De Trinitate):
O Lord the one God, God the Trinity, whatever I have said in these books that is of thine, may they [=my readers] acknowledge who are thine;
if anything of my own, may it be pardoned both by thee and by those who are thine.
Amen.
—St Gregory of Nazianzus, On God and Christ: The Five Theological Orations and Two Letters to Cledonius, transl. Lionel Wickham, Popular Patristics Series 23 (SVS Press, 2002), 37.
—Saint Augustine, The Trinity, 15.28.51.
