“The law was given through Moses, but grace and truth came through Jesus Christ” Marah was a spring of bitter water. When Moses threw wood into it, its water became sweet. Water, you see, is of no avail for future salvation without the proclamation of the Lord’s cross. But when it has been consecrated through the saving mystery of the cross, it is then ready for use in the laver of the Spirit and in the cup of salvation. Therefore, as Moses in his role of prophet threw wood into the spring of Marah, so also the priest sends out into the fountain of baptism the proclamation of the Lord’s cross and the water becomes sweet, ready for the giving of grace.