Full Idea
Heraclitus claimed that from time to time everything becomes fire.
Gist of Idea
Heraclitus said sometimes everything becomes fire
Source
report of Heraclitus (fragments/reports [c.500 BCE]) by Aristotle - Metaphysics 1067a
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.344