Mark 1:4

For the remission of sins. Some commentators think from this that the baptism of John remitted sins, though he says in another place, I baptize you with water, but there has stood one amongst you, who will baptize you with water and the Holy Ghost, to shew that he did not baptize with the Holy Ghost, without which there is no remission of sin. This apparent difficulty will be easily reconciled, if we refer this expression to the word penance, and not baptism; so that by penance their sins were to be washed away, and there were baptized to shew their detestation of their former life. (Jansenius, Concord. Evang.)