We can afford no liberties with liberty itself.

Any court which undertakes by its legal processes to enforce civil liberties needs the support of an enlightened and vigorous public opinion which will be intelligent and discriminating as to what cases really are civil liberties cases and what questions really are involved in those cases.

We are not final because we are infallible, but infallible only because we are final.

The priceless heritage of our society is the unrestricted constitutional right of each member to think as he will. Thought control is a copyright of totalitarianism, and we have no claim to it.

I cannot say that our country could have no secret police without becoming totalitarian, but I can say with great conviction that it cannot become totalitarian without a centralized national police.

There is no such thing as an achieved liberty: like electricity, there can be no substantial storage and it must be generated as it is enjoyed, or the lights go out.

Intellectual freedom means the right to re-examine much that has been long taken for granted. A free man must be a reasoning man, and he must dare doubt what a legislative or electoral majority may most passionately assert.