5 But God being all Mind, and all Logos, both speaks exactly what He thinks, and thinks exactly what He speaks. For His thought is Logos, and Logos is Mind, and Mind comprehending all things is the Father Himself. He, therefore, who speaks of the mind of God, and ascribes to it a special origin of its own, declares Him a compound Being, as if God were one thing, and the original Mind another. So, again, with respect to Logos, when one attributes to him the third place of production from the Father; on which supposition he is ignorant of His greatness; and thus Logos has been far separated from God. As for the prophet, he declares respecting Him, “Who shall describe His generation?” But you pretend to set forth His generation from the Father, and you transfer the production of the word of men which takes place by means of a tongue to the Word of God, and thus are righteously exposed by your own selves as knowing neither things human nor divine.
Source: Adversus haereses (New Advent)