We will be better men, braver and less idle, if we believe that one must search for the things one does not know, rather than if we believe that it is not possible to find out what we do not know and that we must not look for it.
I am the wisest man alive, for I know one thing, and that is that I know nothing.
Pleasure is the greatest incentive to evil.
Everything that deceives does so by casting a spell.
The qualities of number appear to lead to the apprehension of truth.
Until philosophers hold power, neither states nor individuals will have rest from trouble.