It was otherwise with Christian polemical writing. As early as St. Paul the demon-theory appears distinctly, though side by side with utterances of seemingly atheistic character. Other New Testament authors, too, designate the gods as demons. The subsequent apologists, excepting the earliest, Aristides, lay the main stress on demonology, but include for the sake of completeness idolatry and the like, sometimes without caring about or trying to conciliate the contradictions. In the long run demonology is victorious; in St. Augustine, the foremost among Christian apologists, there is hardly any other point of view that counts. To trace the Christian demonology in detail and give an account of its various aspects is outside the scope of this essay. Its origin is a twofold one, partly the Jewish demonology, which just at the commencement of our era had received a great impetus, partly the theory of the Greek philosophers, which we have characterised above when speaking of Xenocrates. The Christian doctrine regarding demons differs from the latter, especially by the fact that it does not acknowledge good demons; they were all evil. This was the indispensable basis for the interdict against the worship of demons; in its further development the Christians, following Jewish tradition, pointed to an origin in the fallen angels, and thus effected a connexion with the Old Testament. While they at the same time retained its angelology they had to distinguish good and evil beings intermediate between god and man; but they carefully avoided designating the angels as demons, and kept them distinct from the pagan gods, who were all demons and evil.