The first works of this Commandment are plain and outward, which we commonly call worship, such as going to mass, praying, and hearing a sermon on holy days. So understood there are very few works in this Commandment; and these, if they are not done in assurance of and with faith in God's favor, are nothing, as was said above. Hence it would also be a good thing if there were fewer saint's days, since in our times the works done on them are for the greater part worse than those of the work days, what with loafing, gluttony, and drunkenness, gambling and other evil deeds; and then, the mass and the sermon are listened to without edification, the prayer is spoken without faith. It almost happens that men think it is sufficient that we look on at the mass with our eyes, hear the preaching with our ears, and say the prayers with our mouths. It is all so formal and superficial! We do not think that we might receive something out of the mass into our hearts, learn and remember something out of the preaching, seek, desire and expect something in our prayer. Although in this matter the bishops and priests, or they to whom the work of preaching is entrusted, are most at fault, because they do not preach the Gospel, and do not teach the people how they ought to look on at mass, hear preaching and pray. Therefore, we will briefly explain these three works. II. In the mass it is necessary that we attend with our a hearts also; and we do attend, when we exercise faith in our hearts. Here we must repeat the words of Christ, when He institutes the mass and says, "Take and eat, this is My Body, which is given for you"; in like manner over the cup, "Take and drink ye all of it: this is a new, everlasting Testament in My Blood, which is shed for you and for many for the remission of sins. This shall ye do, as oft as ye do it, in remembrance of Me." In these words Christ has made for Himself a memorial or anniversary, to be daily observed in all Christendom, and has added to it a glorious, rich, great testament, in which no interest, money or temporal possessions are bequeathed and distributed, but the forgiveness of all sins, grace and mercy unto eternal life, that all who come to this memorial shall have the same testament; and then He died, whereby this testament has become permanent and irrevocable. In proof and evidence of which, instead of letter and seal, He has left with us His own Body and Blood under the bread and wine.