Letters

^21. In the sacrifices appointed by the divine oracles there has been a diversity of institution corresponding to the age in which they were observed. Some sacrifices were offered before the actual manifestation of that new covenant, the benefits of which are provided by the one true offering of the one Priest, namely, by the shed blood of Christ; and another sacrifice, adapted to this manifestation, and offered in the present age by us who are called Christians after the name of Him who has been revealed, is set before us not only in the gospels, but also in the prophetic books. For a change, not of the God, who is worshipped, nor of the religion itself, but of sacrifices and of sacraments, would seem to be proclaimed without warrant now, if it had not been foretold in the earlier dispensation. For just as when the same man brings to God in the morning one kind of offering, and in the evening another, according to the time of day, he does not thereby change either his God or his religion, any more than he changes the nature of a salutation who uses one form of salutation in the morning and another in the evening: so, in the complete cycle of the ages, when one kind of offering is known to have been made by the ancient saints, and another is presented by the saints in our time, this only shows that these sacred mysteries are celebrated not according to human presumption, but by divine authority, in the manner best adapted to the times. There is here no change either in the Deity or in the religion.