All these features that we are but sketching here, gave the Oriental religions a resemblance to Christianity, and the reader of these studies will find many more points in common among them. These analogies are even more striking to us than they were in those times because we have become acquainted in India and China with religions very different from the Roman paganism and from Christianity as well, and because the relationships of the two latter strike us more strongly on account of the contrast. These theological similarities did not attract the attention of the ancients, because they scarcely conceived of the existence of other possibilities, while differences were what they {xxiv} remarked especially. I am not at all forgetting how considerable these were. The principal divergence was that Christianity, by placing God in an ideal sphere beyond the confines of this world, endeavored to rid itself of every attachment to a frequently abject polytheism. But even if we oppose tradition, we cannot break with the past that has formed us, nor separate ourselves from the present in which we live. As the religious history of the empire is studied more closely, the triumph of the church will, in our opinion, appear more and more as the culmination of a long evolution of beliefs. We can understand the Christianity of the fifth century with its greatness and weaknesses, its spiritual exaltation and its puerile superstitions, if we know the moral antecedents of the world in which it developed. The faith of the friends of Symmachus was much farther removed from the religious ideal of Augustus, although they would never have admitted it, than that of their opponents in the senate. I hope that these studies will succeed in showing how the pagan religions from the Orient aided the long continued effort of Roman society, contented for many centuries with a rather insipid idolatry, toward more elevated and more profound forms of worship. Possibly their credulous mysticism deserves as much blame as is laid upon the theurgy of neo-Platonism, which drew from the same sources of inspiration, but like neo-Platonism it has strengthened man's feeling of eminent dignity by asserting the divine nature of the soul. By making inner purity the main object of earthly existence, they refined and exalted the psychic life and gave it an almost supernatural intensity, which until then was unknown in the ancient world. {xxv} PREFACE TO THE SECOND EDITION.