Power corrupts, but lack of power corrupts absolutely.

The tragedy of our day is the climate of fear in which we live, and fear breeds repression. Too often sinister threats to the bill of rights, to freedom of the mind, are concealed under the patriotic cloak, of anti-communism.

It is in the nature of cats to do a certain amount of unescorted roaming.

Our strength lies, not alone in our proving grounds and our stockpiles, but in our ideals, our goals, and their universal appeal to all men who are struggling to breathe free.

A wise man who stands firm is a statesman, a foolish man who stands firm is a catastrophe.

If we value the pursuit of knowledge, we must be free to follow wherever that search may lead us. The free mind is no barking dog to be tethered on a ten-foot chain.

Self-Criticism is the secret weapon of democracy, and candor and confession are good for the political soul.