Human action is purposeful behavior.

Economists
Ludwig von Mises
Born in Lemberg 1881, Mises systematized Austrian economics through praxeology. His socialist calculation argument proved central planning cannot allocate rationally. Via Hayek and Rothbard, he shaped libertarianism.
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Ludwig von Mises's Other Quotes
Economics deals with society's fundamental problems; it concerns everyone and belongs to all. It is the main and proper study of every citizen.
The worst evils which mankind has ever had to endure were inflicted by bad governments.
Government is the only institution that can take a valuable commodity like paper, and make it worthless by applying ink.
Related Quotes
Knowing is not enough, we must apply. Willing is not enough, we must do.
-- Bruce Lee
Fierce-browed, I coolly defy a thousand pointing fingers; head bowed, I willingly serve as a children's ox.
-- Lu Xun
Either explode in silence, or perish in silence.
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A thousand words will not leave so deep an impression as one deed.
-- Henrik Ibsen
Knowing is not enough; we must apply. Willing is not enough; we must do.
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Whoever strives with all his might, that man we can redeem.
-- Johann Wolfgang von Goethe