Freedom of Speech

John Milton opposed censorship for many reasons but one thought sticks in the mind, that "he who destroys a good book, kills reason itself" (1644)

John Milton

Found in: Areopagitica (1644) (Jebb ed.)

...books are not absolutely dead things, but do contain a potency of life in them to be as active as that soul was whose progeny they are; nay, they do preserve as in a vial the purest efficacy and extraction of that living intellect that bred them. I know they are as lively, and as vigorously productive, as those fabulous dragon’s teeth: and being sown up and down, may chance to spring up armed men. And yet, on the other hand, unless wariness be used, as good almost kill a man as kill a good book: who kills a man kills a reasonable creature, God’s image; but he who destroys a good book, kills reason itself, kills the image of God, as it were, in the eye.