This joining of two into one flesh in the sacrament of marriage requires a giving up of things for the harmony of the marriage. Our Lord expresses this in His saying “My God, my God, why hast thou forsaken me?” A fruitful marriage requires the forsaking of things for the union of the two fleshes. This sacrifice on the part of couples is a form of purification from worldly things. Couples voluntarily give up worldly things to give themselves wholly to the sanctity of marriage. This is not a onetime giving up, as any married couple knows. but rather a lifelong process. It is this lifelong sacrifice that invites married couples to turn from worldly things and to purify their hearts turning towards the spouse and through their spouse to the Lord.