There is here a mass of actions and reactions of which the details escape us; but we can form some idea of such a syncretism from the remains of the theological writings attributed to Hermes Trismegistus, from the writings, that is, which are supposed to contain the revelations of the Egyptian god Thot. This professedly Egyptian wisdom includes a number of ideas and definitions which are characteristic of Posidonius and Neo-Pythagorism. The Greek and the Egyptian elements are so closely associated in it that it is very difficult to separate the one from the other. We find another example of the same mixture in the “Chaldaic Oracles,” which were probably composed about the year 200 of our era and which became one of the sacred books of Neo-Platonism. Unlike the Hermetic writings, this collection of verses does indeed seem to have belonged to a sect practising an actual cult: its greater part is taken up with mythology, and the fantastic mysticism of the East is more prominent here than in the Hermetic lore, but the mind of the compiler of these revelations was also penetrated by the ideas which the Greek masters had widely circulated. The tenet of astral immortality, which philosophy shared with the cults emanating from Syria and Persia, imposed itself on the ancient world. It is curious to notice how it was introduced into the theology of the very mysteries to which it was at first foreign: Attis ended by becoming a solar god, and thenceforward it was in the heights of heaven that Cybele was united to the souls she had prevented from wandering in darkness and had saved from hell. The priests of the Alexandrian divinities were similarly to explain that the dead had not their dwelling in the interior of our globe, but that the “subterranean” (ὑπόγειος) kingdom of Serapis was situated beneath the earth, that is, in the lower hemisphere of heaven, bounded by the line of the horizon.[95] According as the Oriental religions were more largely propagated, faith in a new eschatology spread gradually among the people; and although memories and survivals of the old belief in the life of the dead in the grave and the shade’s descent into the infernal depths may have lingered, the doctrine which predominated henceforward was that of celestial immortality.