Baptism is an outward testimony of the inward change in a believer’s life. Water baptism is an act of obedience to the Lord after salvation.

Do you not know that all of us who have been baptised into Christ Jesus were baptised into his death? We were buried therefore with him by baptism into death, in order that, just as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. Romans 6:3-4