So then Ananias baptized the puzzled Saul. As in some of the other occasions in Acts, this happened at once, as soon as the person came to believe in the crucified Jesus as the risen Lord. There was no period of waiting, teaching, or preparation. That would come in due time. Baptism, looking back to Jesus’s own baptism and past that to the crossing of the Red Sea in the Passover story, marked out the new family, the new Passover people.
