Abstract

It is now a commonplace that Aristotle and Theophrastus systematically misunderstood Heraclitus in interpreting fire as an ἀρχή of the kind posited by the Milesians. While air in the thought of Anaxamines and the ἄπειρον in the thought of Anaximander can be considered to play the role of the Aristotelian material substrate without too much distortion, this is not so for fire in the thought of Heraclitus. As Cherniss has indicated, while a substrate of the kind posited by the Milesians is a permanent being underlying change, Heraclitean fire is change itself.