Augustine of Hippo — as excerpted in the Catena Aurea on John 3:27-30

“(Tr. xiii) But wherefore doth he stand? Because he falleth not, by reason of his humility. A sure ground this to stand upon, Whose shoe’s latchet I am not worthy to unloose. Again; He standeth, and heareth Him. So then if he falleth, he heareth Him not. Therefore the friend of the Bridegroom ought to stand and hear, i. e. to abide in the grace which he hath received, and to hear the voice in which he rejoiceth. I rejoice not, he saith, because of my own voice, but because of the Bridegroom’s voice. I rejoice; I in hearing, He in speaking; I am the ear, He the Word. For he who guards the bride or wife of his friend, takes care that she love none else; if he wish to be loved himself in the stead of his friend, and to enjoy her who was entrusted to him, how detestable doth he appear to the whole world? Yet many are the adulterers I see, who would fain possess themselves of the spouse who was bought at so great a price, and who aim by their words at being loved themselves instead of the Bridegroom.”