Forasmuch as He was ordaining a new baptism, He came to the baptism of John, which, in respect of His own baptism, was incomplete, but different from the Jewish baptism, as being between both. He did this that He might shew, by the nature of His baptism, that He was not baptized for the remission of sins, nor as wanting the reception of the Holy Ghost: for the baptism of John was destitute of both these.
But He was baptized that He might be made known to all, that they might believe on Him and “fulfil all righteousness,” which is “keeping of the commandments:” for it has been commanded to men that they should submit to the Prophet’s baptism.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Vict. Ant. e Cat. in Marc.