The assumption of our flesh does not diminish ought from the loftiness of the Deity, but rather exalts the lowness of man’s nature. Hence it follows, And he shall be called the Son of the Highest. Not, Thou shalt give Him the name, but He Himself shall be called. By whom, but His Father of like substance with Himself? For no one hath known the Son but the Father. (Matt. 11:27.) But He in Whom exists the infallible knowledge of His Son, is the true interpreter as to the name which should be given Him, when He says, This is my beloved Son; (Matt. 17:5.) for such indeed from everlasting He is, though His name was not revealed till now; therefore he says, He shall be called, not shall be made or begotten. For before the worlds He was of like substance with the Father. Him therefore thou shalt conceive; His mother thou shalt become; Him shall thy virgin shrine enclose, Whom the heavens were not able to contain.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Photius.