Gregory Thaumaturgus,
Ante-Nicene Fathers Vol. V, Dubious or Spurious Writings…
(1885)
“ But if they say, How can there be three Persons, and how but one Divinity?—we shall make this reply: That there are indeed three persons, inasmuch as there is one person of God the Father, and one of the Lord the Son, and one of the Holy Spirit; and yet that there is but one divinity, inasmuch as the Son is the Image of God the Father, who is One,—that is, He is God of God ”
