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Quantum mechanics and Schrödinger’s cat tossed out the clockwork world of 1890 and replaced it with a fog of probability in which anything could happen. Of course the intellectual class did not notice this for many decades, as an intellectual is a highly educated man who can’t do arithmetic with his shoes on, and is proud of the lack.

— Robert A. Heinlein The Cat Who Walks Through Walls (1985)

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Intelligence

More quotes by Robert A. Heinlein

Love is the condition in which the happiness of another person is essential to your own.

Stranger in a Strange Land (1961)

“My uncle used to say, ‘Never pick up a stray kitten…unless you’ve already made up your mind to be owned by it.’”

The Cat Who Walks Through Walls (1985)

I have never been able to see life as anything but a vast complicated practical joke, and it’s better to laugh than cry.

I Will Fear No Evil (1970)

A generation which ignores history has no past —and no future.

Time Enough for Love (1973)

If you would know a man, observe how he treats a cat.

The Door Into Summer (1957)

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Each of these private teachers who work for pay ... inculcates nothing else than these opinions of the multitude which they opine when they are assembled and calls this knowledge wisdom.

Socrates

Most intellectual people do not believe in God, but they fear him just the same.

Wilhelm Reich Philosophy : An Introduction to the Art of Wondering (2005)

Innocence in genius, and candor in power, are both noble qualities.

Anne Louise Germaine de Staël De l’Allemagne [Germany (1813)

Like every 'intellectual', a philosophy teacher is a petty bourgeois. When he opens his mouth, it is petty-bourgeois ideology that speaks: its resources and ruses are infinite.

Louis Althusser Lenin and Philosophy and Other Essays (1968)

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Quote text and notes from Wikiquote: Robert A. Heinlein (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.