Nevertheless, so essential to religion in the minds of its followers are all these imposing and wonted accessories that our cult did actually manage to borrow them readymade from the great religions that went before it, and to bring them into some sort of artificial relation with its own system. You cannot revolutionize the human mind at one blow. The pagans had been accustomed to all these ideas as integral parts of religion as they understood it: and they proceeded as Christians to accommodate them by side-issues to the new faith, in which these elements had no such natural place as in the older creeds. Not only did sacred places arise at the graves or places of martyrdom of the saints; not only was worship performed beside the bones of the holy dead, in the catacombs and elsewhere; but even a mode of sacrifice and of sacrificial communion was invented in the mass,--a somewhat artificial development from the possibly unsacerdotal Agape-feasts of the primitive Christians. Gradually, churches gathered around the relics of the martyr saints: and in time it became a principle of usage that every church must contain an altar--made of stones on the analogy of the old sacred stones; containing the bones or other relics of a saint, like all earlier shrines; consecrated by the pouring on of oil after the antique fashion; and devoted to the celebration of the sacrifice of the mass, which became by degrees more and more expiatory and sacerdotal in {013}character. As the saints increased in importance, new holy places sprang up around their bodies; and some of these holy places, containing their tombs, became centres of pilgrimage for the most distant parts of Christendom; as did also in particular the empty tomb of Christ himself, the Holy Sepulchre at Jerusalem. The growth of the priesthood kept pace with the growth of ceremonial in general, till at last it culminated in the mediaeval papacy, with its hierarchy of cardinals, archbishops, bishops, priests, and other endless functionaries. Vestments, incense, and like accompaniments of sacerdotalism also rapidly gained ground. All this, too, is a common trait of higher religious evolution everywhere. So likewise are fasting, vigils, and the ecstatic condition. But asceticism, monasticism, celibacy, and other forms of morbid abstinence are peculiarly rife in the east, and found their highest expression in the life of the Syrian and Egyptian hermits.