John bore witness of him, and cried, saying, This was he of whom I spoke, He that comes after me is preferred before me: for he was before me.
All Commentaries on John 1:15 Go To John 1
Cyril of Alexandria
AD 444
John bare witness of Him and cried.
The most wise Evangelist follows again the course of his thoughts and makes the sequel duly correspondent to what preceded. For when he said of the Son of God, we beheld His Glory, the Glory as of the Only-Begotten of the Father, that he might not appear to alone say this (the word we have seen not suiting a single person), he joins with himself his namesake witness, having one and the same piety with himself. I then, says he, bear witness (for I have beheld what I said), and the Baptist likewise bears witness. A most weighty pair of Spirit-clad, and a notable pair of men foster-brothers in truth and unknowing how to lie.
But see how exceeding forcible he made his declaration. For he not only says that John bears witness of Him, but profitably adds and cried, taking his proof from the words The voice of him that crieth in the wilderness, and this too exceeding well. For it was possible that some of the opponents might say, When did the Baptist witness to the Only-Begotten or to whom did he impart the things regarding Him? He cried then, says he, that is, not in a corner does he utter them, not gently and in secret does he bear witness: you may hear him crying aloud more clear than a trumpet, (not you alone hearing these things,) widespread and to all is his speech, glorious the herald, remarkable the voice, great and not unknown the Forerunner.