Cyril of Alexandria

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(Thes. l. x. c. 7.) But the Eunomian Hereticsb say, “How can He be equal to the Father in substance, who is said to increase, as if before imperfect.” But not because He is the Word, but because He is made man, He is said to receive increase. For if He really increased after that He was made flesh, as having before existed imperfect, why then do we give Him thanks as having thence become incarnate for us? But how if He is the true wisdom can He be increased, or how can He who gives grace to others be Himself advanced in grace. Again, if hearing that the Word humbled Himself, no one is offended (thinking slightingly of the true God,) but rather marvels at His compassion, how is it not absurd to be offended at hearing that He increases? For as He was humbled for us, so for us He increased, that we who have fallen through sin might increase in Him. For whatever concerns us, Christ Himself has truly undertaken for us, that He might restore us to a better state. And mark what He says, not that the Word, but Jesus, increases, that you should not suppose that the pure Word increases, but the Word made flesh; and as we confess that the Word suffered in the flesh, although the flesh only suffered, because of the Word the flesh was which suffered, so He is said to increase, because the human nature of the Word increased in Him. But He is said to increase in His human nature, not as if that nature which was perfect from the beginning received increase, but that by degrees it was manifested. For the law of nature brooks not that man should have higher faculties than the age of his body permits. The Word then (made man) was perfect, as being the power and wisdom of the Father, but because something was to be yielded to the habits of our nature, lest He should be counted strange by those who saw Him, He manifested Himself as man with a body, gradually advancing in growth, and was daily thought wiser by those who saw and heard Him.