Full Idea
The guides to what is good and bad for people are pleasure and pain.
Gist of Idea
Pleasure and pain guide our choices of good and bad
Source
Democritus (fragments/reports [c.431 BCE], B188), quoted by John Stobaeus - Anthology 3.01.46
Book Reference
'The First Philosophers', ed/tr. Waterfield,Robin [OUP 2000], p.191