Moreover, it is by no means true that this virtue has only an æsthetic value: the whole religious life supposes it. Sacrifices and privations do not come without privations which cost the worshipper dear. Even if the rites do not demand material gifts from him, they require his time and his strength. In order to serve his gods, he must forget himself; to make for them a fitting place in his own life, he must sacrifice his profane interests. The positive cult is possible only when a man is trained to renouncement, to abnegation, to detachment from self, and consequently to suffering. It is necessary that he have no dread of them: he cannot even fulfil his duties joyfully unless he loves them to some extent. But for that, it is necessary that he train himself, and it is to this that the ascetic practices tend. So the suffering which they impose is not arbitrary and sterile cruelty; it is a necessary school, where men form and temper themselves, and acquire the qualities of disinterestedness and endurance without which there would be no religion. If this result is to be obtained, it is even a good thing that the ascetic ideal be incarnated eminently in certain persons, whose speciality, so to speak, it is to represent, almost with excess, this aspect of the ritual life; for they are like so many living models, inciting to effort. Such is the historic rôle of the great ascetics. When their deeds and acts are analysed in detail, one asks himself what useful end they can have. He is struck by the fact that there is something excessive in the disdain they profess for all that ordinarily impassions men. But these exaggerations are necessary to sustain among the believers a sufficient disgust for an easy life and common pleasures. It is necessary that an elite put the end too high, if the crowd is not to put it too low. It is necessary that some exaggerate, if the average is to remain at a fitting level.