But while the mass is the word of Christ, it is also true that God is wont to add to well-nigh every promise of His a certain sign as a mark or memorial of His promise, so that we may thereby the more faithfully hold to His promise and be the more forcibly admonished by it. Thus, to his promise to Noah that He would not again destroy the world by a flood, He added His bow in the clouds, to show that He would be mindful of His covenant [Gen. 9:13]. And after promising Abraham the inheritance in his seed, He gave him the sign of circumcision as the seal of his righteousness by faith. Thus, to Gideon He granted the sign of the dry and the wet fleece, to confirm His promise of victory over the Midianites [Judges 6:36 ff.]. And to Ahaz He offered a sign through Isaiah concerning his victory over the kings of Syria and Samaria, to strengthen his faith in the promise [Isa. 7:10 ff.]. And many such signs of the promises of God do we find in the Scriptures. Thus also to the mass, that crown of all His promises. He adds His body and blood in the bread and wine, as a memorial sign of this great promise; as He says, "This do in remembrance of me." [1 Cor. 11:24] Even so in baptism He adds to the words of the promise, the sign of immersion in water. We learn from this that in every promise of God two things are presented to us--the word and the sign--so that we are to understand the word to be the testament, but the sign to be the sacrament. Thus, in the mass, the word of Christ is the testament, and the bread and wine are the sacrament. And as there is greater power in the word than in the sign, so there is greater power in the testament than in the sacrament; for a man can have and use the word, or testament, apart from the sign, or sacrament. "Believe," says Augustine, "and thou hast eaten."[60] But what does one believe save the word of promise? Therefore I can hold mass every day, yea, every hour, for I can set the words of Christ before me, and with them refresh and strengthen my faith, as often as I choose. That is a truly spiritual eating and drinking.[61]