An expert is a person who has made all the mistakes that can be made in a very narrow field.
Every sentence I utter must be understood not as an affirmation, but as a question.
Never express yourself more clearly than you think.
Opposites are not contradictory but complementary.
Prediction is very difficult, especially about the future.
The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
Your theory is crazy, but it's not crazy enough to be true.
The character of a people may be ruined by charity.
