Water baptism

Believing in Christ produces an inward change in our heart; baptism in water is an outward act of obedience, by which we testify of the change that has taken place in our hearts. By this act, we make ourselves one with Christ in His burial and in His resurrection; we are separated from the old life of sin and defeat; we come out of the water to lead a new life of righteousness and victory, made possible by God’s power in us. Mark 16:16
Matt 28:19-20
Acts 2:38-41
Acts 8:37-39
Romans 6:4