Here are some quotes about freedom of speech:

- "If freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter." - George Washington
- "Without freedom of speech there is no modern world, just a barbaric one." - Ai Weiwei
- "If liberty means anything at all, it means the right to tell people what they do not want to hear." - George Orwell
- "What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie
- "Free expression is the base of human rights, the root of human nature and the mother of truth. To kill free speech is to insult human rights, to stifle human nature and to suppress truth." - Liu Xiaobo

I hope these quotes help you in your search for information on freedom of speech. Let me know if you have any other questions.