The history of intellectual growth and discovery clearly demonstrates the need for unfettered freedom, the right to think the unthinkable, discuss the unmentionable, and challenge the unchallengeable. To curtail free expression strikes twice at intellectual freedom, for whoever deprives another of the right to state unpopular views necessarily also deprives others of the right to listen to those views.

I like to pay taxes. With them, I buy civilization.

Certainty generally is illusion, and repose is not the destiny of man.

I find the great thing in this world is not so much where we stand, as in what direction we are moving: To reach the port of heaven, we must sail sometimes with the wind and sometimes against it, but we must sail, and not drift, nor lie at anchor.

There is in all men a demand for the superlative, so much so that the poor devil that has no other way of reaching it attains it by getting drunk.

I should like to see any kind of man, distinguishable from a gorilla, that some good and even pretty woman could not shape a husband out of.

To be master of any branch of knowledge, you must master those which lie next to it, and thus to know anything you must know all.