Full Idea
Democritus thinks that happiness consists in the determination and separation of pleasures, and that this is what is both finest and most beneficial for people.
Gist of Idea
Happiness is identifying and separating the pleasures
Source
report of Democritus (fragments/reports [c.431 BCE], A167) by John Stobaeus - Anthology 2.07.3
Book Reference
'The First Philosophers', ed/tr. Waterfield,Robin [OUP 2000], p.189
A Reaction
A great deal of the strategy and ethics of living consists (if you are lucky) of discriminating among possible pleasures. Philosophers should produce criteria.