I indeed have baptized you with water: but he shall baptize you with the Holy Spirit.
All Commentaries on Mark 1:8 Go To Mark 1
Basil the Great
AD 379
The baptism which was handed down through Moses recognized, first, a distinction among sins, for the grace of pardon was not accorded all transgressions. It also required various sacrifices, laid down precise rules for purification, and segregated for a time those who were in a state of impurity and defilement. It appointed the observance of days and seasons, and only then baptism was received as the seal of purification. The baptism of John was far more excellent: It recognized no distinction of sins, nor did it require a variety of sacrifices, nor did it appoint strict rules for purification or any observance of days or seasons. Indeed, with no delay at all, anyone who had confessed his sins, however numerous or grave, had access at once to the grace of God and his Christ.