In Acts 19, Paul arrives in Ephesus and teaches the new "believers" more adequately about the message and ministry of Jesus. They had learned from John the Baptist about repentance and believing in Jesus, but had apparently not received complete instruction. Evidence of this is seen in their response to Paul's introductory question to them. They were not aware of whether the Holy Spirit had been given to them. It may have been that Paul noticed something not quite right about these "believers" in their outward demonstration of their faithful commitment to Jesus. After Paul's more adequate explanation and public baptism in the name of Jesus (v.5), they received the Holy Spirit when he laid his hands on them. Now satisfied with their complete conversion, Paul then went to the synagogue to proclaim again to the Jews the message of Jesus Christ. Maybe one lesson from Paul in this chapter can be applied for the benefit of the church today. Are there regular-attending "believers" in the church who lack an adequate understanding of the message and ministry of Jesus? If they have not moved on to faithful commitment to Jesus, maybe some need to be "re-baptized" and receive the Holy Spirit, truly completing their conversion. Interestingly, Paul took time to do this on arrival in Ephesus before proclaiming Christ in the synagogue.