Passages of this kind continually occur in the ancient moralists,(196) and they show how naturally the highest type of national excellence determined the prevailing school of moral philosophy, and also how the influence of the heroic period of national history would act upon the best minds in the subsequent and wholly different phases of development. It was therefore not surprising that during the Empire, though the conditions of national life were profoundly altered, Stoicism should still be the philosophical religion, the great source and regulator of moral enthusiasm. Epicureanism had, indeed, spread widely in the Empire,(197) but it proved little more than a principle of disintegration or an apology for vice, or at best the religion of tranquil and indifferent natures animated by no strong moral enthusiasm. It is indeed true that Epicurus had himself been a man of the most blameless character, that his doctrines were at first carefully distinguished from the coarse sensuality of the Cyrenaic school which had preceded them, that they admitted in theory almost every form of virtue, and that the school had produced many disciples who, if they had not attained the highest grades of excellence, had at least been men of harmless lives, intensely devoted to their master, and especially noted for the warmth and constancy of their friendships.(198) But a school which placed so high a value on ease and pleasure was eminently unfit to struggle against the fearful difficulties that beset the teachers of virtue amid the anarchy of a military despotism, and the virtues and the vices of the Romans were alike fatal to its success. All the great ideals of Roman excellence belonged to a different type. Such men as a Decius or a Regulus would have been impossible in an Epicurean society, for even if their actuating emotion were no nobler than a desire for posthumous fame, such a desire could never grow powerful in a moral atmosphere charged with the shrewd, placid, unsentimental utilitarianism of Epicurus. On the other hand, the distinctions the Epicureans had drawn between more or less refined pleasures and their elevated conceptions of what constitutes the true happiness of men, were unintelligible to the Romans, who knew how to sacrifice enjoyment, but who, when pursuing it, gravitated naturally to the coarsest forms. The mission of Epicureanism was therefore chiefly negative. The anti-patriotic tendency of its teaching contributed to that destruction of national feeling which was necessary to the rise of cosmopolitanism, while its strong opposition to theological beliefs, supported by the genius and enthusiasm of Lucretius, told powerfully upon the decaying faith.