A weak man is just by accident. A strong but non-violent man is unjust by accident.

Being the richest man in the cemetery doesn't matter to me. Going to bed at night saying we've done something wonderful, that's what matters to me.

I always like to look on the optimistic side of life, but I am realistic enough to know that life is a complex matter.

I have gained this from philosophy: that I do without being commanded what others do only from fear of the law.

No excellent soul is exempt from a mixture of madness.

Education is what remains after one has forgotten what one has learned in school.

I do not believe a man can ever leave his business. He ought to think of it by day and dream of it by night. Henry Ford A bore is a person who opens his mouth and puts his feats in it. 

For a successful revolution it is not enough that there is discontent. What is required is a profound and thorough conviction of the justice, necessity and importance of political and social rights.

No sanction can stand against ignited minds.

I have not failed. I've just found 10,000 ways that won't work.

Isn't it strange that I who have written only unpopular books should be such a popular fellow?

Follow the path of the unsafe, independent thinker. Expose your ideas to the danger of controversy. Speak your mind and fear less the label of 'crackpot' than the stigma of conformity.