If an idea does not appear bizarre, there is no hope for it.
The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.
It is the hallmark of any deep truth that its negation is also a deep truth.
Never express yourself more clearly than you are able to think.
There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.
It is very difficult to make an accurate prediction, especially about the future.