On the day of Pentecost, Peter explained the way in which the crucifixion and resurrection of Jesus fulfilled prophecy and confirmed His identity as Messiah. Peter called the crowd to turn away from their sin and turn toward a life of following Jesus. This decision was to be made a public confession of faith through baptism. 3,000 responded in the way that Peter directed. They then devoted themselves to learning Jesus’ teaching through the 12 apostles, to the Lord’s Supper, to building relationships, taking care of each other, to prayer, and to regularly gathering in large public groups and small groups in homes.