Tractates on the Gospel of John

¹⁶ What, however, are they accustomed to say against us? “Behold, after John, baptism was given.” For before that question was properly treated in the Catholic Church, many erred in it, both great and good men; but because they were members of the dove, they did not cut themselves off, and in their case that happened which the apostle said, “If in any thing you are otherwise minded, God shall reveal even this unto you.” Whence those who separated themselves became unteachable. What then are they wont to say? Behold, after John baptism was given; after heretical baptism is it not to be given? Because certain who had the baptism of John were commanded by Paul to be baptized, for they had not the baptism of Christ. Why then, say they, do you exaggerate the merit of John, and, as it were, underrate the misery of heretics? I also grant to you that the heretics are wicked; but the heretics gave the baptism of Christ, which baptism John did not give.