"We are not afraid to entrust the American people with unpleasant facts, foreign ideas, alien philosophies, and competitive values. For a nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people."
-- John F. Kennedy

"Once a government is committed to the principle of silencing the voice of opposition, it has only one way to go, and that is down the path of increasingly repressive measures, until it becomes a source of terror to all its citizens and creates a country where everyone lives in fear."
-- Harry S. Truman, message to Congress, August 8, 1950

"Censorship, like charity, should begin at home; but unlike charity, it should end there."
-- Clare Booth Luce

"Everyone is in favor of free speech. Hardly a day passes without its being extolled, but some people's idea of it is that they are free to say what they like, but if anyone else says anything back, that is an outrage."
-- Winston Churchill

"Children deprived of words become school dropouts; dropouts deprived of hope behave delinquently. Amateur censors blame delinquency on reading immoral books and magazines, when in fact, the inability to read anything is the basic trouble."
-- Peter S. Jennison

For more quotes -   http://quotes.forbiddenlibrary.com/