Full Idea
In reality we know nothing about anything, but belief restructures things for each of us.
Gist of Idea
We in fact know nothing, but we each restructure our reality with beliefs
Source
Democritus (fragments/reports [c.431 BCE], B007), quoted by Sextus Empiricus - Against the Professors (six books) 7.136
Book Reference
'The First Philosophers', ed/tr. Waterfield,Robin [OUP 2000], p.176