Full Idea
Heraclitus says that at some time everything becomes fire.
Gist of Idea
Heraclitus says that at some time everything becomes fire
Source
report of Heraclitus (fragments/reports [c.500 BCE]) by Aristotle - Physics 204b37
Book Reference
Aristotle: 'Physics', ed/tr. Waterfield,Robin [OUP 1996], p.68
A Reaction
Modern cosmology says that Heraclitus was right (pretty much). If we say 'energy' instead of 'fire' (which may be what he meant), then he is absolutely spot-on.