Acts 2:42 "So then, those who had received his word were baptized; and that day there were added about three thousand souls."
1. A regenerate heart.
Excerpts from Edward T. Hiscox's "New Directory for Baptist Churches" on the subject of regenerate church membership
One may become a member of the kingdom of heaven by being "born from above," but he cannot become a member of the visible Church except he confess that spiritual change in the waters of baptism.