Why water baptism?  Because it is, according to the Bible, an outward testimony of what has occurred inwardly in a believer’s life.  KNOW YE NOT, THAT SO MAY OF US AS WERE BAPTIZED INTO JESUS CHRIST WERE BAPTIZED INTO HIS DEATH?  THEREFORE, WE ARE BURIED WITH HIM BY BAPTISM INTO DEATH; THAT LIKE AS CHRIST WAS RAISED UP FROM THE DEAD BY THE GLORY OF THE FATHER, EVEN SO WE ALSO SHOULD WALK IN NEWNESS OF LIFE – ROMANS 6:3-4