There is only one Scriptural method of baptism prescribed by the Word of God--immersion. Repentance in the Bible is symbolic of death—death to the sins & ungodliness of life before meeting Jesus Christ. Spiritually speaking, when a man comes to an altar of repentance, he is actually coming to the cross of Calvary. Old carnal natures are crucified with Christ. After death (to sins) it is a "must" to be buried. (Rom 6:4) In baptism He is followed to the grave and "we are buried with Him."