“John . . . was a good man and had exhorted the Jews to lead righteous lives, to practice justice towards their fellows and piety towards God, and so doing to join in baptism. In his view this was a necessary preliminary if baptism was to be acceptable to God. They must not employ it to gain pardon for whatever sins they committed, but as a consecration of the body implying that the soul was already thoroughly cleansed by right behavior.”