We learn from history that we learn nothing from history.

No question is so difficult to answer as that to which the answer is obvious.

Progress is impossible without change; and those who cannot change their minds cannot change anything.

Laws, religions, creeds, and systems of ethics, instead of making society better than its best unit, make it worse than its average unit, because they are never up to date.

I've posed nude for a photographer in the manner of Rodin's Thinker, but I merely looked constipated.

It is in the hour of trial that a man finds his true profession.

Alcohol is the anesthesia by which we endure the operation of life.