Alexander of Alexandria

How, also, can He be changeable and mutable, who says indeed by Himself: "I am in the Father, and the Father in Me," and, "I and My Father are one;" and by the prophet, "I am the Lord, I change not?" For even though one saying may refer to the Father Himself, yet it would now be more aptly spoken of the Word, because when He became man, He changed not; but, as says the apostle, "Jesus Christ, the same yesterday, today, and for ever."