Science is most significant as one of the greatest spiritual adventures that man has yet known.
KARL POPPERWe must plan for freedom, and not only for security, if for no other reason than only freedom can make security more secure.
More Karl Popper Quotes
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We can all participate in the heritage of man. We all can help to preserve it. And we can all make our own modest contribution to it.
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The wise man belongs to all countries, for the home of a great soul is the whole world.
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It is complete nihilism to propose laying down arms in a world where atom bombs are around. It is very simple: there is no way of achieving peace other than with weapons.
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Our knowledge can only be finite, while our ignorance must necessarily be infinite.
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Science may be described as the art of systematic oversimplification.
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Great men may make great mistakes.
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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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And it implies that if we respect truth, we must search for it by persistently searching for our errors: by indefatigable rational criticism, and self-criticism.
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Every intellectual has a very special responsibility. He has the privilege and the opportunity of studying.
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I hold that he who teaches that not reason but love should rule opens up the way for those who rule by hate.
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The conspiracy theory of society, comes from abandoning God and then asking: “Who is in his place?”
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If you can’t say it simply and clearly, keep quiet, and keep working on it till you can.
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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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I would rather find a single causal law than be the king of Persia!
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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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The simple truth is that truth is hard to come by, and that once found may easily be lost again.
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Theology, I still think, is due to a lack of faith.
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We may become the makers of our fate when we have ceased to pose as its prophets.
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Those who promise us paradise on earth never produced anything but hell.
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We must regard all laws or theories as hypothetical or conjectural; that is, as guesses.
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What we need and what we want is to moralize politics, not to politicize morals.
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True ignorance is not the absence of knowledge, but the refusal to acquire it.
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“We don’t know anything” and believed that this was the most important philosophical truth.
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Those who promise us paradise on earth never produced anything but hell.
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In so far as a scientific statement speaks about reality, it must be falsifiable: and in so far as it is not falsifiable, it does not speak about reality.
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It is wrong to think that belief in freedom always leads to victory; we must always be prepared for it to lead to defeat. If we choose freedom, then we must be prepared to perish along with it.
KARL POPPER