John 8:29

"And the Father is with Me." That they may not deem the "who sent Me" to be a mark of inferiority, He saith, "is with Me"; the first belongeth to the Dispensation, the second to the Godhead. "And He hath not left Me alone," for I do always those things that please Him. Again He hath brought down His discourse to a humbler strain, continually setting Himself against that which they asserted, that He was not of God, and that He kept not the Sabbath. To this He replieth, "I do always those things that are pleasing unto Him"; showing that it was pleasing unto Him even that the Sabbath should be broken. So, for instance, just before the Crucifixion He said, "Think ye that I cannot call upon My Father?" And yet by merely saying, "Whom seek ye?" He cast them down backwards. Why then saith He not, "Think ye that I cannot destroy you," when He had proved this by deed? He condescendeth to their infirmity. For He took great pains to show that He did nothing contrary to the Father. Thus He speaketh rather after the manner of a man; and as "He hath not left Me alone," was spoken, so also was the, "I do always those things that are pleasing unto Him."

Thus then He spoke to the Jews, and added, "And He that sent me is with me." He had already said this also before, but of this important point He is constantly reminding them,-"He sent me," and "He is with me." If then, O Lord, He is with Thee, not so much hath the One been sent by the other, but ye Both have come. And yet, while Both are together, One was sent, the Other was the sender; for incarnation is a sending, and the incarnation itself belongs only to the Son and not to the Father. The Father therefore sent the Son, but did not withdraw from the Son. For it was not that the Father was absent from the place to which He sent the Son. For where is not the Maker of all things? Where is He not, who said, "I fill heaven and earth"? But perhaps the Father is everywhere, and the Son not so? Listen to the evangelist: "He was in this world, and the world was made by Him." Therefore said He, "He that sent me," by whose power as Father I am incarnate, "is with me,-hath not left me." Why hath He not left me? "He hath not left me," He says, "alone; for I do always those things that please Him." That equality exists always; not from a certain beginning, and then onwards; but without beginning, without end. For Divine generation has no beginning in time, since time itself was created by the Only-begotten.

(Tr xl. 6) And though both are together, yet one is sent, the other sends. For the mission is the incarnation; and the incarnation is of the Son only, not of the Father. He says then, He that sent Me, meaning, By whose Fatherly authority I am made incarnate. The Father however, though He sent the Son, did not withdraw from Him, as He proceeds to say: The Father hath not left Me alone. For it could not be that where He sent the Son, there the Father was not; He who says, I fill heaven and earth. (Jer. 33) And He adds the reason why He did not leave Him: For I do always those things that please Him; always, i. e. not from any particular beginning, but without beginning and without end. For the generation from the Father hath no beginning in time.