=240.= In this attitude of the Stoics towards religion we can easily distinguish certain historical changes. Zeno represents in the main the critical temper; his tone is revolutionary and atheistic; he contemplates the entire subversion of existing religious practices to make room for a purer system. The principles of Cleanthes are the same, but finer expression in a more cheerful spirit; he has no bitterness as to the present, and much confidence in the future. With Chrysippus there sets in a tide of reconciliation; the ingenuities of etymology and allegorical interpretation are set to work to prove that the old religion contains, at least in germ, the substance of the new. The practical dangers of this method are obvious, and have not escaped the notice of the critics of Stoicism. It may be well to smoothe the path of the convert by allowing him to use old formulas and practices with a new meaning; it is not so easy to excuse the acceptance of a purely formal conversion, by which philosophy enrols as its nominal adherents men who give it no real submission, and increases its numbers at the cost of its sincerity. Posidonius stands out as the type of this weakness; with him begins the subordination of philosophic principle to religious sentiment. In the first period of Roman Stoicism the struggle was acute; many of the Stoics had the courage to defy the inherited prejudices of their fellow-countrymen, others bowed before the storm. Those who condemn the Stoics in a body as having sacrificed their convictions, in order that they might hold the honoured and lucrative positions of defenders of the national religion[1], show a lack both of sympathy and of critical discernment. All through the Roman period the Stoics held in theory a definite and consistent position, which will be expounded in this chapter; in the application of their principles to practical problems they showed that variation of standard and temperament which history has always to record even of societies of honourable and intelligent men. But it must be admitted that as the Stoics increase in numbers, their devotion to vital principles grows weaker, till at last we recognise in Marcus Aurelius both the most critical of Stoic thinkers, and the man in whom the powers of thought are most definitely subjected to the play of old associations and prejudices. [Sidenote: Dogmas of natural religion.]