Protagoras asserted that there are two sides to every question, exactly opposite to each other.
There is only a finger's difference between a wise man and a fool.
The only way to gall and fret effectively is for yourself to be a good and honest man.
Discourse on virtue and they pass by in droves. Whistle and dance the shimmy, and you've got an audience.
I do not know whether there are gods, but there ought to be.
Even if I am but a pretender to wisdom, that in itself is philosophy.