What progress we are making. In the Middle Ages they would have burned me. Now they are content with burning my books.
— Sigmund Freud

Whenever books are burned men also in the end are burned.
— Heinrich Heine

Your own mind is a sacred enclosure into which nothing harmful can enter except by your permission.
— Arnold Bennett

Adam was but human—this explains it all. He did not want the apple for the apple's sake, he wanted it only because it was forbidden. The mistake was in not forbidding the serpent; then he would have eaten the serpent.
— Mark Twain

Censorship, like charity, should begin at home, but, unlike charity, it should end there.
— Clare Boothe Luce