1. Nothing will be explained by the perfectly true (Stoic) statement that the world, as corporeal being that ever existed and that will ever exist, is indebted for the cause of its perpetuity to the volition of the divinity. We might find an analogy between the change of the elements, and the death of animals without the perishing of the form of the species here below, and the universe above, whose body is subject to a perpetual flux and flow. Thus the divine volition could preserve for it the same specific form in spite of successive alterations, so that, without perpetually retaining numerical unity, it would ever preserve the specific unity of form. It would indeed be a remarkable discrepancy in the methods of nature that here below in animals the form alone should be perpetual, while in the heaven and the stars their individuality should be considered as perpetual as their form. THERE MUST INEVITABLY BE CHANGE IN HEAVEN. The incorruptibility of the heaven has been ascribed to its containing within its breast all things,[201] and to the non-existence of any other thing into which it could change, as well as to the impossibility of its meeting anything exterior that could destroy it. These theories would indeed, in a reasonable manner, explain the incorruptibility of heaven considered as totality, and universe; but would fail to explain the perpetuity of the sun and of the other stars which are parts of heaven, instead of being the whole universe, as is the heaven. It would seem more reasonable that, just like the fire and similar things, the stars, and the world considered as universe would possess a perpetuity chiefly of form. It is quite possible that the heaven, without meeting any destructive exterior thing, should be subjected to a perpetual destruction such that it would preserve nothing identical but the form, from the mere mutual destruction of its parts. In this case its substrate, being in a perpetual flux, would receive its form from some other principle; and we would be driven to recognize in the universal living Organism what occurs in man, in the horse, and in other animals; namely, that the man or horse (considered as species) lasts forever, while the individual changes. (According to this view, then) the universe will not be constituted by one ever permanent part, the heaven, and another ceaselessly changing one, composed of terrestrial things. All these things will then be subject to the same condition though they might differ by longer or shorter duration, since celestial bodies are more durable. Such a conception of the perpetuity characteristic of the universe and its parts contains less ambiguity (than the popular notion), and would be freed from all doubt if we were to demonstrate that the divine power is capable of containing the universe in this manner. The theory that the world contains something perpetual in its individuality would demand not only a demonstration