164. But if they think of this as the subjection of the Son, namely, that the Father makes all things in union with His will, let them learn that this is really a proof of inseparable power. For the unity of Their will is one that began not in time, but ever existed. But where there is a constant unity of will, there can be no weakness of temporal subjection. For if He were made subject through His nature, He would always remain in subjection; but since He is said to be made subject in time, that subjection must be part of an assumed office and not of an everlasting weakness: especially as the eternal Power of God cannot change His state for a time, neither can the right of ruling fall to the Father in time. For if the Son ever will be changed in such wise as to be made subject in His Godhead, then also must God the Father, if ever He shall gain more power, and have the Son in subjection to Himself in His Godhead, be considered now in the meantime inferior according to your explanation.