As George Bernard Shaw pointed out,
"All censorships exist to prevent anyone from challenging current conceptions and existing institutions. All progress is initiated by challenging current conceptions, and executed by supplanting existing institutions. Consequently, the first condition of progress is the removal of censorship."
Or as Julian Assange said, "What does censorship reveal? It reveals fear".
Or Pablo Antonio Caudra,
"Let us be clear: censorship is cowardice. ... It masks corruption. It is a school of torture: it teaches, and accustoms one to the use of force against an idea, to submit thought to an alien "other." But worst still, censorship destroys criticism, which is the essential ingredient of culture".
Or Voltaire, "Think for yourselves and let others enjoy the privilege to do so, too".
Need I go on?