An army of principles can penetrate where an army of soldiers cannot.

Your success and happiness lies in you. Resolve to keep happy, and your joy and you shall form an invincible host against difficulties.

What can you do against the lunatic who is more intelligent than yourself, who gives your arguments a fair hearing and then simply persists in his lunacy?

I eat next to nothing.

Love or hatred must constantly increase between two persons who are always together; every moment fresh reasons are found for loving or hating better.