Shake off all the fears of servile prejudices, under which weak minds are servilely crouched. Fix reason firmly in her seat, and call on her tribunal for every fact, every opinion. Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason than that of blindfolded fear.
Nothing in the world can take the place of Persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent. The slogan 'Press On' has solved and always will solve the problems of the human race.
The knowledge of the world is only to be acquired in the world, and not in a closet.
Everything of importance has been said before by somebody who did not discover it.
By all means marry; if you get a good wife, you'll be happy. If you get a bad one, you'll become a philosopher.
Human beings have an inalienable right to invent themselves.
I am free of all prejudice. I hate everyone equally.