Acts 19:5

ἀκούσαντες δέ, and when they heard. What they heard was not the mere statement that Jesus was the Messiah; but all the arguments with which St Paul demonstrated that this was so, and proved that in Him the Scriptures were fulfilled. The conviction need not have been sudden, though its description is brief.

εἰς τὸ ὄνομα, into the name. Cf. Matthew 28:19 and Acts 2:38 note. These men followed the order appointed for admission to the privileges of the Christian covenant. No argument can be drawn from this verse for a repetition of baptism. These disciples had never received such a baptism as Christ ordained. John’s baptism was but a washing symbolical of the repentance which he preached; baptism into the name of Christ is the pledge of a covenant of salvation.