John 17:8

But what human language will suffice to explain how the Father gave those words to the Son? The question, of course, will appear easier if we suppose Him to have received such words in His capacity as the Son of man. And yet, although thus born of the Virgin, who will undertake to relate when and how it was that He learned them, since even that very generation which He had of the Virgin who will venture to declare? But if our idea be that He received these words of the Father in His capacity as begotten of, and co-eternal with, the Father, let us then exclude all such thoughts of time as if He existed previous to His possessing them, and so received the possession of that which He had not before; for whatever God the Father gave to God the Son, He gave in the act of begetting. For the Father gave those things to the Son without which He could not be the Son, in the same manner as He gave Him being itself. For how otherwise would He give any words to the Word, wherein in an ineffable way He hath spoken all things?

He testified then to those who love Him, that they received and kept the words given Him by the Father, and were besides satisfied that He came, and was sent, from God; while those who were diseased with the contrary opinion were otherwise minded. For they who neither received His words nor kept their minds open to conviction, were not disposed to believe that He came from God, and was sent by Him. Moreover, the Jews said on one occasion: If this Man were from God, He would not have broken the Sabbath; and on another, We are disciples of Moses: we know that God hath spoken unto Moses, but as for this Man we know not whence He is. You see how they denied His mission; so that they even cried in their shamelessness, they knew not whence He was. And that they did not admit His unspeakably high birth from everlasting, I mean His proceeding from God the Father, diseased as they were by the great perversity of their thoughts, and ready to stone Him with stones merely because of His Incarnation, you may easily satisfy yourself, if you will listen to the words of the Evangelist: For this cause therefore the Jews sought to kill Him, because He not only brake the Sabbath, but also called God His own Father, making Himself equal with God. And what the impious Jews said unto Him is also recorded: For a good work we stone Thee not, but for blasphemy; because that Thou, being a man, makest Thyself God. You will understand then very clearly, that those who truly keep His words have believed and confessed that He manifested Himself from the Father (for this is, I think, what I came forth means), and that He was sent to us to tell us the commandment of the Lord, as is said in the Psalms; while they who laughed to scorn the Word, Who was thus Divine and from the Father, rejected the faith, and plainly denied that He was God and from the Father, and that He came to us for our salvation, and dwelt among us, yet without sin. Justly, then, does He commend to God the Father, those who are good men, and are His own, and have submitted their souls to the hearing of His words, and will ever hold them in remembrance; that what He said may be made clear, beginning from the time of His sojourn amongst us. And what are His words? Everyone therefore who shall confess Me before men, him will I also confess before My Father Which is in heaven. But whosoever shall deny Me before men, him…