What finally emerges from the 'clear and present danger' cases is a working principle that the substantive evil must be extremely serious and the degree of imminence extremely high before utterances can be punished...It must be taken as a command of the broadest scope that explicit language, read in the context of a liberty-loving society, will allow.

In revealing the workings of government that led to the Vietnam War, the newspapers nobly did precisely that which the Founders hoped and trusted they would do.

Loyalty must arise spontaneously from the hearts of people who love their country and respect their government.

[I]t is true that [the provisions of the Bill of Rights] were designed to meet ancient evils. But they are the same kind of human evils that have emerged from century to century whenever excessive power is sought by the few at the expense of the many.

The First Amendment has erected a wall between church and state. That wall must be kept high and impregnable. We could not approve the slightest breach.

The flagrant disregard in the courtroom of elementary standards of proper conduct should not and cannot be tolerated.

When I was 40, my doctor advised me that a man in his 40s shouldn't play tennis. I heeded his advice carefully and could hardly wait until I reached 50 to start again.