1. When Christ the Lord was about to celebrate the passover meal with his disciples and institute the sacrifice of his body and blood, he directed them to prepare a large room, arranged for the supper (Lk 22:12). The Church has always regarded this command of Christ as applying to itself when it gives directions about the preparation of the sentiments of the worshipers, the place, rites, and texts for the celebration of the eucharist. The current norms, laid down on the basis of the intent of Vatican Council II, and the new Missal that will be used henceforth in the celebration of Mass by the Church of the Roman Rite, are fresh evidence of the great care, faith, and unchanged love that the Church shows toward the eucharist. They attest as well to its coherent tradition, continuing amid the introduction of some new elements.