Jesus Christ instituted the mass at his last supper, when he took bread and blessed and broke and gave to his disciples and said, Take ye and eat, this is my body; and taking the chalice he gave thanks, and gave to them saying, Drink ye all of this: For this is my blood of the new testament, which shall be shed for many unto remission of sins: Matth. XXVI, 26. In this brief account are mentioned all the _essential_ parts of the mass. Christ commanded the apostles and through them their successors to perform the same holy rite "in commemoration" of Him, and they obeyed His commands, as we learn from the acts of the apostles, and the first epistle to the Corinthians. [Sidenote: Its early ceremonies.] Gradually various prayers and ceremonies were added to the sacred words pronounced by Christ, as the Apology of St. Justin, the writings of St. Cyprian, the catechetical discourses of St. Cyril of Jerusalem and other early works prove. The Apostles themselves had added the Lord's prayer[3]. The liturgy however during the first four centuries, as Le Brun maintains[4], or, according to Muratori followed by Palmer, the first three centuries, was not written, but was preserved by oral tradition, according to the received practice of the early church, which, unwilling to give what is holy to dogs, or to cast pearls before swine concealed from all persons, except the faithful, the mysteries of faith. It would seem from St. Justin's apology, that much was left to the particular devotion of the bishop or priest who offered mass, and hence we might expect not to find in the earliest liturgies great uniformity, except in essentials and general outline. Yet Le Brun has endeavoured to restore, from the early Christian writers, the liturgy used in the first four centuries: and it contains the most important prayers and ceremonies of the mass in its more modern form. [Sidenote: Discipline of secrecy.]