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We must plan for freedom, and not only for security, if for no other reason than only freedom can make security more secure.

Karl Popper

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Karl Popper
Age: 92 †
Born: 1902
Born: July 28
Died: 1994
Died: September 17
Philosopher
Philosopher Of Science
Sociologist
University Teacher
Writer
Vienna
Austria
Karl Raimund Popper Sir
Karl Raimund
Sir Popper
Sir Karl Raimund Popper
Secure
Plan
Plans
Security
Freedom
Reason
Must
Make
Ethics

More quotes by Karl Popper

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The influence (for good or ill) of Plato's work is immeasurable. Western thought, one might say, has been Platonic or anti-Platonic, but hardly ever non-Platonic.
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The attempt to make heaven on earth invariably produces hell.
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No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
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Man, some modern philosophers tell us, is alienated from his world: he is a stranger and afraid in a world he never made. Perhaps he is yet so are animals, and even plants. They too were born, long ago, into a physico-chemical world, a world they never made.
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The game of science is, in principle, without end. He who decides one day that scientific statements do not call for any further test, and that they can be regarded as finally verified, retires from the game.
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What really makes science grow is new ideas, including false ideas.
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True ignorance is not the absence of knowledge, but the refusal to acquire it.
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I have insisted that we must be tolerant. But I also believe that this tolerance has its limits. We must not trust those anti-humanitarian religions which not only preach destruction but act accordingly. For if we tolerate them, then we become ourselves responsible for for their deeds.
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It is part of my thesis that all our knowledge grows only through the correcting of our mistakes.
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The open society is one in which men have learned to be to some extent critical of taboos, and to base decisions on the authority of their own intelligence.
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We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant.
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It is wrong and dangerous to extol freedom by telling people that they will certainly be all right once they are free. The most we can say of democracy or freedom is that they give our personal abilities a little more influence on our well-being.
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In my view, aiming at simplicity and lucidity is a moral duty of all intellectuals: lack of clarity is a sin, and pretentiousness is a crime.
Karl Popper
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The old scientific ideal of episteme - of absolutely certain, demonstrable knowledge - has proved to be an idol. The demand for scientific objectivity makes it inevitable that every scientific statement must remain tentative for ever.
Karl Popper
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[The aim of science is] to explain what so far has taken to be an explicans, such as a law of nature. The task of empirical science constantly renews itself. We may go on forever, proceeding to explanations of a higher and higher universality.
Karl Popper
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The history of science is everywhere speculative. It is a marvelous hiatory. It makes you proud to be a human being.
Karl Popper
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There is no history, only histories.
Karl Popper
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The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance
Karl Popper
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A theory that explains everything, explains nothing
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The use of violence is justified only under a tyranny which makes reforms without violence impossible, and should have only one aim, that is, to bring about a state of affairs which makes reforms without violence possible.
Karl Popper