Books won't stay banned. They won't burn. Ideas won't go to jail. In the long run of history, the censor and the inquisitor have always lost. The only sure weapon against bad ideas is better ideas.
—Alfred Whitney Griswold
Censorship, like charity, should begin at home; but, unlike charity, it should end there.
—Clare Booth Luce
A censor is a man who knows more than he thinks you ought to.
—Granville Hicks
The suppression of uncomfortable ideas may be common in religion and politics, but it is not the path to knowledge; it has no place in the endeavor of science.
—Carl Sagan in Cosmos
If mankind minus one were of one opinion, then mankind is no more justified in silencing the one than the one - if he had the power - would be justified in silencing mankind.
—John Stuart Mill
I think it's the duty of the comedian to find out where the line is drawn and cross it deliberately.
—George Carlin