19. I think that we have fully followed out the announcement of John the Baptist, whence we began our discourse, when he said to the Jews, “I indeed baptize you with water unto repentance; but He who cometh after me is greater than I, whose shoe’s latchet I am not worthy to unloose: He shall baptize you with the Holy Ghost, and with fire.” Moreover, I think also that we have not unsuitably set in order the teaching of the Apostle John, who says that “three bear witness, the Spirit, and the water, and the blood; and these three are one.” And, unless I am mistaken, we have also explained what our Lord says: “John indeed baptized with water, but ye shall be baptized with the Holy Ghost.” Moreover, I think that we have given no weak reason as the cause of the custom. Let us have a care, although we do that in a subsequent place, that none may think that we are stirring up the present debate on a single article; although this custom even alone ought, among men who have the fear of God, and are lowly, to maintain a chief place.