in 1 Tim. 4, 1.3 Paul calls the prohibition of meats a doctrine of devils; for it is against the Gospel to institute or to do such works that by them we may merit grace, or as though Christianity could not exist without Buch service of God.
Here our adversaries object that our teachers are opposed to discipline and mortification of the flesh, as Jovinian. But the contrary may be learned from the writings of our teachers. For they have always taught concerning the cross that it behooves Christians to bear afflictions. This is the true, earnest, and unfeigned mortification, to wit, to be exercised with divers afflictions, and to be crucified with Christ.
Moreover, they teach that every Christian ought to train and subdue himself with bodily restraints, or bodily exercises and labors, that neither satiety nor slothfulness tempt him to sin, but not that we may merit grace or make satisfaction for sins by such exercises. And such external discipline ought to be urged at all times, not only on a few and set days. So Christ commands, Luke 21, 34: Take heed lest your hearts be overcharged with surfeiting; also Matt. 17, 21: This kind goeth not out but by prayer and fasting. Paul also says, 1 Cor. 9, 27: keep under my body and bring it into subjection. Here he clearly shows that he was keeping under his body, not to merit, forgiveness of sins by that discipline, but to have his body in subjection and fitted for spiritual things, and for the discharge of duty according to his calling. Therefore, we do not condemn fasting in itself, but the traditions which prescribe certain days and certain meats, with peril of conscience, as though such works were a necessary service.
Nevertheless, very many traditions are kept on our part, which conduce to good order in the Church, as the Order of Lessons in the Mass and the chief holy-days. But, at the same time, men are warned that such observances do not justify before God, and that in such things it should not be made sin if they he omitted without offense. Such liberty in human rites was not unknown to the Fathers. For in the East they kept Easter at another time than at Rome, and when, on account of this diversity, the Romans accused the Eastern Church of schism, they were admonished by others that such usages need not be alike everywhere. And Irenaeus Bays: Diversity concerning fasting does not destroy the harmony of faith; as also Pope Gregory intimates in Dist. XII, that such diversity does not violate the unity of the Church. And in the Tripartite History, Book 9, many examples of dissimilar rites are gathered, and the following statement is made: It was not the mind of the Apostles to enact rules concerning holy-days, but to preach godliness and a holy life [, to teach faith and love].
Article XXVII: Of Monastic Vows.
What is taught on our part concerning Monastic Vows, will be better understood if it be remembered what has been the state of