Full Idea
The original holder of the theory claimed ...that units came about when the unequals were equalised.
Gist of Idea
Units came about when the unequals were equalised
Source
Aristotle (Metaphysics [c.324 BCE], 1081a24)
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.411
A Reaction
Presumably you could count the things that were already equal. You can count days and count raindrops. The genius is to see that you can add the days to the raindrops, by treating them as equal, in respect of number.