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The attempt to make heaven on earth invariably produces hell.

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
Make
Invariably
Produces
Attempt
Produce
Hell
Heaven
Earth

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Our knowledge can only be finite, while our ignorance must necessarily be infinite.
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No book can ever be finished. While working on it we learn just enough to find it immature the moment we turn away from it
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We do not know. We can only guess.
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There is no pure, disinterested, theory-free observation.
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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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We must plan for freedom, and not only for security, if for no other reason than only freedom can make security more secure.
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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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Historically speaking all - or very nearly all - scientific theories originate from myths.
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We know a great deal, but our ignorance is sobering and boundless. With each step forward, with each problem which we solve, we not only discover new and unsolved problems, but we also discover that where we believed that we were standing on firm and safe ground, all things are, in truth, insecure and in a state of flux.
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We never know what we are talking about.
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No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
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But some of these theories are so bold that they can clash with reality: they are the testable theories of science. And when they clash, then we know that there is a reality something that can inform us that our ideas are mistaken.
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We do not choose political freedom because it promises us this or that. We choose it because it makes possible the only dignified form of human coexistence, the only form in which we can be fully responsible for ourselves. Whether we realize its possibilities depends on all kinds of things — and above all on ourselves.
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The survival value of intelligence is that it allows us to extinct a bad idea, before the idea extincts us.
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The best thing that can happen to a human being us to find a problem, to fall in love with that problem, and to live trying to solve that problem, unless another problem even more lovable appears.
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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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With regards to political enemies Plato had a kill-and-banish principle. ... In interpreting it , modern-day Platonists are clearly disturbed by it, even as they make elaborate attempts to defend Plato.
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True ignorance is not the absence of knowledge, but the refusal to acquire it.
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The defence of democracy must consist in making anti-democratic experiences too costly for those who try them much more costly than a democratic compromise
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Those who promise us paradise on earth never produced anything but a hell.
Karl Popper