When a thing is funny, search it carefully for a hidden truth.

Nothing is worth doing unless the consequences may be serious.

Few people think more than two or three times a year. I have made an international reputation for myself by thinking once or twice a week.

Few people think more than two or three times a year; I have made an international reputation for myself by thinking once or twice a week.

If history repeats itself, and the unexpected always happens, how incapable must man be of learning from experience.

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

If you cannot get rid of the family skeleton, you may as well make it dance.