
Gregory the Great
Catena Aurea · Matthäusevangelium 3
I indeed baptize you with water unto repentance: but He that cometh after me is mightier than I, Whose shoes I am not worthy to bear: He shall baptize you with the Holy Ghost, and with fire: Whose fan is in His hand, and He will throughly purge His floor, and gather His wheat into the garner; but He will burn up the chaff with unquenchable fire.
(ubi sup.) Why then does he baptize who could not remit sin, but that he may preserve in all things the office of forerunner? As his birth had preceded Christ’s birth, so his baptism should precede the Lord’s baptism.