How is baptism a public testimony of your salvation?
If you are a new Christian, then baptism is usually your first opportunity to publicly testify to the new change in your life. Now that you are saved, you should make a public profession and take a stand for Christ. Baptism is a great way to do that. It is an opportunity to confess Christ before others, as Jesus said in Matthew 10:32-33, “Whosoever therefore shall confess me before men, him will I confess also before my Father which is in heaven. (33) But whosoever shall deny me before men, him will I also deny before my Father which is in heaven.
Baptism is a public testimony. When John the Baptist, and Jesus and the Apostles baptized in the Jordan River, they were showing in a very public way the new life of those new converts. When the Ethiopian Eunuch was baptized in Acts 8.38, he was baptized in a very public manner. Nearly every example of baptism that we see in the New Testament was done in a public way, showing publicly what had taken place in the new believer’s life.
Peter says in First Peter 3:21 that baptism is “the answer of a good conscience toward God.” When one is publicly baptized in front of the congregation of God’s people, he is establishing a public testimony that he is right with God and willing to live for God.