3 And he said to them, “Into what then were you baptized?” So they said, “Into John’s baptism.” 4 Then Paul said, “John indeed baptized with a baptism of repentance, saying to the people that they should believe on Him who would come after him, that is, on Christ Jesus.” 5 When they heard this, they were baptized in the name of the Lord Jesus (Acts 19:3–5, NKJV).
Paul asked these disciples of John a simple, probing, and informative question: “Into what then were you baptized?” Their answer (“into John’s baptism”) gave Paul the opening to explain the prerequisite and outcome of John’s baptism and help them become Christ’s disciples. First, repentance was necessary to receive John’s baptism, without which his baptism “for the remission of sins” was useless (Luke 3:3, 7-8; Matt. 3:5-8). Second, John’s preaching and baptism prepared people to believe on the Messiah (whom Paul tells them is Christ Jesus, Acts 19:4; Luke 3:3-6). John’s baptism served its purpose and ran its course. Convinced that Jesus is the Christ (in whom John prepared them to put their faith), John’s disciples became disciples of Jesus by being “baptized in the name of the Lord Jesus” (by His authority, Acts 19:5). They were not disciples of Jesus before and until they were baptized in His name. Christ’s baptism remains how believers become disciples of Jesus. Faith that Jesus is the Christ, the Son of God, prepares the sinner to repent and be baptized in His name to be saved and become His disciple (Mark 16:16; Acts 2:36-41; 10:48; Gal. 3:26-27).