In the book of Acts, we have the Divine record of the gospel being preached and thousands obeying to be saved, become Christians. No one became a Christian by the Siiner’s prayer. Instead, we read they were saved when they believed in Jesus enough to repent of their sins, confess Him to be the Son of God and be baptized (immersed in water) for the forgiveness of their sins. After being saved, Jesus added them to His one universal church. In various localities, they assembled together as local churches. The first local church was the church meeting in Jerusalem. From Acts, we have the Divine record of this church that was guided and unified by the apostles’ teaching in their worship and work together. How did they worship? What work did they do together? Unlike many local churches today, they did not follow the traditions of men that conflict with the apostles’ teaching.