George Orwell - Freedom is the right to tell people what they do not want to hear, to offend people who want to suppress your voice and to express the fact that you will not be a slave to those people who want to control what you think.
Noam Chomsky quotes - If you believe in freedom of speech, you believe in freedom of speech for views you don't like. Goebbels was in favor of freedom of speech for views he liked. So was Stalin. If you're in favor of freedom of speech, that means.