In addition to respect for authority it preached fraternity. All the initiates considered themselves as sons of the same father owing to one another a brother's affection. It is a question whether they extended the love of neighbor to that universal charity taught by philosophy and Christianity. Emperor Julian, a devoted mystic, liked to set up such an ideal, and it is probable that the Mithraists of later paganism rose to this conception of duty,[49] but they were not its authors. They seemed to have attached more importance to the virile qualities than to compassion and gentleness. The fraternal spirit of initiates calling themselves soldiers was doubtless more akin to the spirit of comradeship in a regiment that has _esprit de corps_, than to the love of one's neighbor that inspires works of mercy towards all. All primitive people imagine nature filled with unclean and wicked spirits that corrupt and torture those who disturb their repose; but dualism endowed this universal belief with marvelous power as well as with a dogmatic basis. Mazdaism is governed throughout by ideas of purity and impurity. "No religion on earth has ever been so completely dominated by an ideal of purification."[50] This kind of perfection was the goal of the aspiration and effort of believers. They were obliged to guard with infinite precaution against defiling the divine elements, for instance water or fire, or their own persons, and to wipe out all pollution by {157} repeated lustrations. But, as in the Syrian cults of the imperial period, these Mithraic rites did remain simply formal, mechanical and of the flesh, inspired by the old idea of _tabu_. Mithraic baptism wiped out moral faults; the purity aimed at had become spiritual. This perfect purity distinguishes the mysteries of Mithra from those of all other Oriental gods. Serapis is the brother and husband of Isis, Attis the lover of Cybele, every Syrian Baal is coupled with a spouse; but Mithra lives alone. Mithra is chaste, Mithra is holy (_sanctus_),[51] and for the worship of fecundity he substitutes a new reverence for continence.