The connection of his philosophy with what precedes is as follows: In Heraclitus’ Idea as motion, all moments are absolutely vanishing. Empedocles represents the gathering together of this motion into a unity, but into a synthetic unity; and with Leucippus and Democritus it is the same. With Empedocles, however, the moments of this unity are the existent elements of fire, water, &c., and with the others, pure abstractions, implicit being, thoughts. But in this way universality is directly asserted, for the opposing elements have no longer any sensuous support. We have had Being, Becoming, the One, as principles; they are universal thoughts and not sensuous, nor are they figures of the imagination; the content and its parts are, however, taken from what is sensuous, and they are thoughts in some sort of a determination. Anaxagoras now says that it is not gods, sensuous principles, elements, or thoughts—which really are determinations of reflection—but that it is the Universal, Thought itself, in and for itself, without opposition, all embracing, which is the substance or the principle. The unity as universal, returns from the opposition into itself, while in the synthesis of Empedocles, what is opposed is still apart from it and independent, and Thought is not Being. Here, however, Thought as pure, free process in itself, is the self-determining universal, and is not distinguished from conscious thought. In Anaxagoras quite new ground is thus opened up. Anaxagoras concludes this period, and after him a fresh one begins. In accordance with the favourite idea of there being a genealogical descent of principles from the teacher to the taught, because he was an Ionian, he is often represented as perpetuating the Ionic school, and as an Ionic philosopher: Hermotimus of Clazomenæ, too, was his teacher. To support this theory Diogenes Laertius (II. 6) makes him a disciple of Anaximenes, whose birth is, however, placed in Ol. 55-58, or about sixty years earlier than that of Anaxagoras.