[F]aith must have something which it believes, that is, of which it takes hold, and upon which it stands and rests. Thus faith clings to the water, and believes that it is Baptism, in which there is pure salvation and life; not through the water (as we have sufficiently stated), but through the fact that it is embodied in the Word and institution of God, and the name of God inheres in it. Now, if I believe this, what else is it than believing in God as in Him who has given and planted His Word into this ordinance, and proposes to us this external thing wherein we may apprehend such a treasure?