After his death Jesus showed the apostles a lot of convincing evidence that he was alive. For 40 days he appeared to them and talked with them about God’s kingdom.
Peter answered them, “All of you must turn to God and change the way you think and act, and each of you must be baptized in the name of Jesus Christ so that your sins will be forgiven. Then you will receive the Holy Spirit as a gift.
Baptism, which is like that water, now saves you. Baptism doesn’t save by removing dirt from the body. Rather, baptism is a request to God for a clear conscience. It saves you through Jesus Christ, who came back from death to life.