“Censorship is telling a man he can't have a steak just because a baby can't chew it.”
Mark Twain (1835–1910) American author and humorist
Often attributed to Twain online, but unsourced. Alternate source: "The whole principle [of censorship] is wrong. It's like demanding that grown men live on skim milk because the baby can't have steak." — Robert Heinlein, The Man Who Sold the Moon, 1951, p. 188.
Misattributed