“Anyone who considers protocol unimportant has never dealt with a cat.”
The Cat Who Walks Through Walls (1985)
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Robert A. Heinlein 557
American science fiction author 1907–1988Related quotes


“Anyone who has never made a mistake has never tried anything new.”
Variant: A person who never made a mistake never tried anything new.

“If anyone can be considered the greatest writer who ever lived, it is Shakespeare.”
Asimov's Chronology of the World (1991), p. 226
General sources

The Infallibility of the Church (London: John Murray, 1888; 4th ed. 1914), p. 111 https://archive.org/stream/a607385500salmuoft#page/n143/mode/2up.

“Anyone who believes you can't change history has never tried to write his memoirs.”
Attributed to Ben-Gurion in A Call to Action : The Handbook to Unite and Ignite America's Betrayed and Imperiled Public (2004) by A. T. Theodore, p. 6, but earlier published as a saying of unknown authorship in Uncommon Sense : The World's Fullest Compendium of Wisdom (1987) by Joseph Telushkin, p. 204
Disputed

“Never, ever go near power. Don't become friends with anyone who has real power. It's dangerous.”
Quoted in "After Stanley Kubrick" (18 August 2010), an interview of his wife Christiane Kubrick in The Guardian