Heraclitus, as Aristotle found, did not use the categories of formal logic, and tended to describe the same thing [the Logos] now as a god, now as a form of matter, now as a rule of behavior or principle which was nevertheless a physical constituent of things. He was, indeed, more of a metaphysician than this Ionian predecessors, less concerned with the mechanics of development and change than with the unifying reality that underlay them. (186).



