means Anaxagoras’ infinite mixture or the atomists’ infinity of unchanging atoms, alter or recombine in different ways. This is Empedocles’ solution too. He says, echoing Parmenides, that in a way nothing ever changes. The basic building-blocks of the cosmos, which Empedocles called “roots” but which Aristotle and later philosophers will call “elements,” are always the same. They just get separated and combined in different ways, which yields the universe we see around us (§349).

