37 A sufficient answer, then, seems to have been given to their suggestion. Now I ask them, what the Saviour asked: “The baptism of John, was it from heaven or men?” The Jews could not answer Him. If the Jews did not make nothing of the baptism of John, does Auxentius make nothing of the baptism of Christ? For that is not a baptism of men, but from heaven, which the angel of great counsel has brought to us, that we might be justified to God. Wherefore, then, does Auxentius hold that the faithful ought to be rebaptized, when they have been baptized in the name of the Trinity, when the Apostle says: “One faith, one baptism”? And wherefore does he say that he is man's enemy, not Christ's, seeing that he despises the counsel of God and condemns the baptism which Christ has granted us to redeem our sins.
Source: Sermon against Auxentius (New Advent)