disorderly motion but, inasmuch as God preferred order to disorder, was by him brought together in one place. This substance, he says, is converted into the four elements, fire, water, air, earth, of which the world itself and all that therein is are formed. Karth alone of these elements is not subject to change, the assumed cause being the peculiarity of its constituent triangles. For he thinks that in all the other elements the figures employed are homogeneous, the scalene triangle out of which they are all put together being one and the same, whereas for earth a triangle of peculiar shape is employed ; the element of fire is a pyramid, of air an octahedron, of water an icosahedron, of earth a cube. Hence earth is not transmuted into the other three elements, nor these three into earth. But the elements are not separated each into its own region of the universe, because the revolution unites their minute particles, compressing and forcing them together into the centre, at the same time as it separates the larger masses. Hence as they change their shapes, so also do they change the regions which they occupy.” And there is one created universe,° seeing that it is perceptible to sense, which has been made by God. And it is animate because that which is animate is better than that which is inanimate.? And _ this piece of workmanship is assumed to come from a cause supremely good.? It was made one and not unlimited because the pattern from which he made it was one. And it is spherical because such is the shape of its maker. For that maker contains the other living things, and this universe the shapes of