Nor is it reasonable to say that Julian's undertaking was impossible. His plans were indeed those of an inexperienced enthusiast; but had he lived as long as Constantine, and learned by experience, he might have witnessed his substantial success; and a century of intelligently continuous policy to the same end might have expelled Christianity as completely from the Roman world as Buddhism was soon to be expelled from India. No one who has studied the latter phenomenon can use the language commonly held of the attempt of Julian. Buddhism, representing at least as high a moral impetus as that of Christism, had arisen and nourished greatly in direct opposition to Brahmanism; after centuries of success it is found assimilating all the popular superstitions on which Brahmanism lived, even as Christianity assimilated those of paganism; and it was either by assimilating elements of Buddhism on that plane or by such policy joined with coercive force that the Brahmans finally eliminated it from their sphere. Had a succession of Roman emperors set themselves to create a priestly organization of pagan cults, with as good an economic basis as that of Brahmanism, or as that of Judaism was even after the fall of the Temple, they could have created a force which might triumph over the new cult in its own sphere even as Brahmanism and Judaism did. And if at the same time they had left the Church severely alone, allowing its perpetual strifes to do their own work, it would inevitably have dissolved itself by sheer fission into a hundred mutually menacing factions, an easy foe for a coherent paganism. Mere spasmodic persecution had previously failed, for it is not random persecution that kills creeds, though a really relentless and enduring persecution can do much. In the period from 330 to 370, and again in the sixth century, the Persian kings did actually, by sheer bloodshed, so far crush orthodox Christianity in their kingdom (leaving only the Nestorians as anti-Byzantine heretics) that it ceased to have any importance there--a circumstance little noted by those who dwell on its "success" in Europe. And the same Sassanide dynasty, beginning in the middle of the third century, effected the systematic revival of the Mazdean religion, which before had seemed corrupted and discredited past remedy.