Christian baptism is, according to the Bible, an outward testimony of what has occurred inwardly in a believer’s life.
Christian baptism illustrates a believer’s identification with Christ’s death, burial, and resurrection.
The Bible declares, “Or don't you know that all of us who were baptized into Christ Jesus were baptized into his death? We were therefore buried with Him through baptism into death in order that, just as Christ was raised from the dead through the glory of the Father, we too may live a new life” - Romans 6:3-4. In Christian baptism, the action of being immersed in the water symbolizes dying and being buried with Christ. The action of coming out of the water pictures Christ’s resurrection.