of a good Demiurge, and that this was why order and harmony prevailed in the world. The world was the best, the most beautiful, perfect. It had a perfect shape (spherical) and a perfect motion (circular). But Plato said nothing about the Demiurge architect-of-the-world himself being perfect. And understandably so, for perfection implied finitude, limits; whereas it was the world, not its creator, that had limits. A similar view was held by Aristotle: the world could be perfect, but God could not. Only the pantheist Stoics held the divinity to be perfect — precisely because they identified it with the world. Cicero wrote in De natura deorum (On the Nature of the Gods) that the world "encompasses... within itself all beings... And what could be more nonsensical than denying perfection to an all-embracing being... Besides the world, there is no thing that does not lack something and that is harmonious, perfect and finished in every respect..." At a certain moment, Greek philosophy became bound up with the religion of the Christians: the abstract concept of first cause became linked with the religious concept of God; the primum movens became identified with the Creator, the absolute with the divine Person. Features of an absolute existence were discovered in the Person of the Creator: He was immutable, timeless. And absolute existence took on the attributes of a person: it was good, omnipotent, omnipresent. Christian theology united the features of the first cause in Aristotle's Metaphysics with those of the Creator in the Book of Genesis. But the attributes of God did not include perfection, for a perfect being must be finite; only of such a being might one say that it lacked nothing. There was another reason for the denial, to God, of perfection — in a branch of Christian theology that was under the influence of Plotinus. In this view, the absolute from which the world derived could not be grasped in terms of human concepts, even the most general and transcendent. Not only was that absolute not matter, it was not spirit either, nor idea; it was superior to these. It exceeded any description or praise; it was incomprehensible and ineffable; it was beyond all that we may imagine — including perfection. Medieval Christian philosophy held that the concept of perfection might describe Creation, but was not appropriate to describe God. Saint Thomas Aquinas, indicating that he was following Aristotle,