For the construction of a durable system of Christology, still further elaboration was necessary. The pre-existence of Jesus, as an emanation from God, in whom were summed up the attributes of the pleroma or full scale of Gnostic aeons, was now generally conceded. But the relation of this pleroqma to the Godhead of which it was the visible manifestation, needed to be more accurately defined. And here recourse was had to the conception of the "Logos,"--a notion which Philo had borrowed from Plato, lending to it a theosophic significance. In the Platonic metaphysics objective existence was attributed to general terms, the signs of general notions. Besides each particular man, horse, or tree, and besides all men, horses, and trees, in the aggregate, there was supposed to exist an ideal Man, Horse, and Tree. Each particular man, horse, or tree consisted of abstract existence plus a portion of the ideal man, horse, or tree. Sokrates, for instance, consisted of Existence, plus Animality, plus Humanity, plus Sokraticity. The visible world of particulars thus existed only by virtue of its participation in the attributes of the ideal world of universals. God created the world by encumbering each idea with an envelopment or clothing of visible matter; and since matter is vile or imperfect, all things are more or less perfect as they partake more or less fully of the idea. The pure unencumbered idea, the "Idea of ideas," is the Logos, or divine Reason, which represents the sum-total of the activities which sustain the world, and serves as a mediator between the absolutely ideal God and the absolutely non-ideal matter. Here we arrive at a Gnostic conception, which the Philonists of Alexandria were not slow to appropriate. The Logos, or divine Reason, was identified with the Sophia, or divine Wisdom of the Jewish Gnostics, which had dwelt with God before the creation of the world. By a subtle play upon the double meaning of the Greek term (logos = "reason" or "word"), a distinction was drawn between the divine Reason and the divine Word. The former was the archctypal idea or thought of God, existing from all eternity; the latter was the external manifestation or realization of that idea which occurred at the moment of creation, when, according to Genesis, God SPOKE, and the world was.