I love America more than any other country in the world and, exactly for this reason, I insist on the right to criticize her perpetually.
The rule is perfect: in all matters of opinion our adversaries are insane.
Opposition always enflames the enthusiast, never converts him.
Opposition is not necessarily enmity; it is merely misused and made an occasion for enmity.
I stood among them, but not of them; in a shroud of thoughts which were not their thoughts.
The beginning of thought is in disagreement -- not only with others but also with ourselves.
One-fifth of the people are against everything all the time.
If I were to remain silent, I'd be guilty of complicity.
Everything you are against weakens you. Everything you are for empowers you.
Blind belief in authority is the greatest enemy of truth.