as I have already mentioned; that of it, one part is a plenum, and the other a vacuum. He also says that the elements, and the worlds which are derived from them, are infinite, and are dissolved again into them; and that the worlds are produced in this manner: That many bodies, of various kinds and shapes, are borne by amputation from the infinite, into a vast vacuum; and then, they being collected together, produce one vortex; according to which they, dashing against one another, and whirling about in every direction, are separated in such a way that like attaches itself to like.
But as they are all of equal weight, when by reason of their number they are no longer able to whirl about, the thin ones depart into the outer vacuum, as if they bounded through, and the others remain behind, and becoming entangled with one another, run together, and produce a sort of spherical shaped figure.
This subsists as a kind