Wars and revolutions and battles are due simply and solely to the body and its desires.
It is better to be at odds with the whole world than, being one, to be at odds with myself.
No man has a right to be an amateur in the matter of physical training
Wisest is he who knows he knows not.
The life of which meaning one never ponders is not worth living
I alone know I am wise because I alone know I know nothing.