Enjoy the best Karl Popper Quotes. Quotations by Karl Popper (Philosopher of Science)
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The history of science is a history of irresponsible dreams, of obstinacy, and of error.
Every solution of a problem raises new unsolved problems.
Our knowledge can only be finite, while our ignorance must necessarily be infinite.
If you can't say it simply and clearly, keep quiet.
No rational argument will have a rational effect on a man who does not want a rational attitude.
Optimism is a duty. The future is open. It is not predetermined.
We are social creatures to the inmost centre of our being.
Whenever a theory appears to you as the only possible one, take this as a sign that you have not understood.
The attempt to make heaven on earth invariably produces hell.
True ignorance is not the absence of knowledge, but the refusal to acquire it.