Below you will find our collection of inspirational, wise, and humorous
old theory quotes, theory sayings, and theory proverbs, collected over the years from a variety
of sources.
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.Karl Popper
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No theory changes what it is a theory about; man remains what he has always been.B. F. Skinner
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All theory is against the freedom of the will; all experience for it.Samuel Johnson
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A professor must have a theory as a dog must have fleas. H. L. Mencken
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That theory is worthless. It isn't even wrong!Wolfgang Pauli
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A theory which cannot be mortally endangered cannot be alive.W. A. H. Rushton
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Thought and theory must precede all salutary action; yet action is nobler in itself than either thought or theory.William Wordsworth