The Framers [of the Constitution] knew that free speech is the friend of change and revolution. But they also knew that it is always the deadliest enemy of tyranny.
Hugo LaFayette Black (1886 - 1971)
Source: 1960, Address at the New York University School of Law
Public opinion is a weak tyrant compared with our own private opinion. What a man thinks of himself, that it is which determines, or rather indicates, his fate.
No totalitarians, no wars, no fears, famines or perils of any kind can really break a man's spirit until he breaks it himself by surrendering. Tyranny has many dread powers, but not the power to rule the spirit.