Top 100

Top 140 Karl Popper Quotes (2023 Update)

Karl Popper Quote: “All life is problem solving.”
Karl Popper Quote: “True ignorance is not the absence of knowledge, but the refusal to acquire it.”
Karl Popper Quote: “I may be wrong and you may be right, and by an effort, we may get nearer to the truth.”
Karl Popper Quote: “It is part of my thesis that all our knowledge grows only through the correcting of our mistakes.”
Karl Popper Quote: “Optimism is a duty. The future is open. It is not predetermined. No one can predict it, except by chance. We all contribute to determining it by what we do. We are all equally responsible for its success.”
Karl Popper Quote: “A theory that explains everything, explains nothing.”
Karl Popper Quote: “Those who promise us paradise on earth never produced anything but a hell.”
Karl Popper Quote: “If you can’t say it simply and clearly, keep quiet, and keep working on it till you can.”
Karl Popper Quote: “No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.”
Karl Popper Quote: “The attempt to make heaven on earth invariably produces hell.”
Karl Popper Quote: “No number of sightings of white swans can prove the theory that all swans are white. The sighting of just one black one may disprove it.”
Karl Popper Quote: “It is not his possession of knowledge, of irrefutable truth, that makes the man of science, but his persistent and recklessly critical quest for truth.”
Karl Popper Quote: “We do not know. We can only guess.”
Karl Popper Quote: “Every genuine test of a theory is an attempt to falsify it, or to refute it.”
Karl Popper Quote: “Every solution of a problem raises new unsolved problems.”
Karl Popper Quote: “The only way to test a hypothesis is to look for all the information that disagrees with it.”
Karl Popper Quote: “Science must begin with myths, and with the criticism of myths.”
Karl Popper Quote: “The growth of knowledge depends entirely upon disagreement.”
Karl Popper Quote: “Ignorance is not a simple lack of knowledge but an active aversion to knowledge, the refusal to know, issuing from cowardice, pride, or laziness of mind.”
Karl Popper Quote: “The survival value of intelligence is that it allows us to extinct a bad idea, before the idea extincts us.”
Karl Popper Quote: “It can’t happen here is always wrong: a dictatorship can happen anywhere.”
Karl Popper Quote: “There is no history, only histories.”
Karl Popper Quote: “Our knowledge can only be finite, while our ignorance must necessarily be infinite.”
Karl Popper Quote: “It is impossible to speak in such a way that you cannot be misunderstood.”
Karl Popper Quote: “We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant.”
Karl Popper Quote: “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.”
Karl Popper Quote: “There will be well-testable theories, hardly testable theories, and non-testable theories. Those which are non-testable are of no interest to empirical scientists. They may be described as metaphysical.”
Karl Popper Quote: “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.”
Karl Popper Quote: “I have spoken to Einstein and he admitted to me that his theory was in fact no different from the one of Parmenides.”
Karl Popper Quote: “The difference between the amoeba and Einstein is that, although both make use of the method of trial and error elimination, the amoeba dislikes erring while Einstein is intrigued by it.”
Karl Popper Quote: “Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.”
Karl Popper Quote: “The history of science is everywhere speculative. It is a marvelous hiatory. It makes you proud to be a human being.”
Karl Popper Quote: “If we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them.”
Karl Popper Quote: “What really makes science grow is new ideas, including false ideas.”
Karl Popper Quote: “Evolution is not a fact. Evolution doesn’t even qualify as a theory or as a hypothesis. It is a metaphysical research program, and it is not really testable science.”
Karl Popper Quote: “While differing widely in the various little bits we know, in our infinite ignorance we are all equal.”
Karl Popper Quote: “All things living are in search of a better world .”
Karl Popper Quote: “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.”
Karl Popper Quote: “A theory is just a mathematical model to describe the observations.”
Karl Popper Quote: “A rationalist is simply someone for whom it is more important to learn than to be proved right; someone who is willing to learn from others – not by simply taking over another’s opinions, but by gladly allowing others to criticize his ideas and by gladly criticizing the ideas of others.”
Karl Popper Quote: “If you know that things are bound to happen whatever you do, then you may feel free to give up the fight against them.”
Karl Popper Quote: “The quest for precision is analogous to the quest for certainty and both – precision and certainty are impossible to attain.”
Karl Popper Quote: “Good tests kill flawed theories; we remain alive to guess again.”
Karl Popper Quote: “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 Quote: “The genuine rationalist does not think that he or anyone else is in possession of the truth; nor does he think that mere criticism as such helps us achieve new ideas. But he does think that, in the sphere of ideas, only critical discussion can help us sort the wheat from the chaff.”
Karl Popper Quote: “We all remember how many religious wars were fought for a religion of love and gentleness; how many bodies were burned alive with the genuinely kind intention of saving souls from the eternal fire of hell.”
Karl Popper Quote: “Simple statements are to be prized more highly than less simple ones because they tell us more; because their empirical content is greater; and because they are better testable.”
Karl Popper Quote: “It is wrong to ask who will rule. The ability to vote a bad government out of office is enough. That is democracy.”
Karl Popper Quote: “Serious rational criticism is so rare that it should be encouraged. Being too ready to defend oneself is more dangerous than being too ready to admit a mistake.”
Karl Popper Quote: “Science is perhaps the only human activity in which errors are systematically criticized and, in time, corrected.”
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