Karl Popper
Karl Popper
Sir Karl Raimund Popper CH FBA FRSwas an Austrian-British philosopher and professor. He is generally regarded as one of the greatest philosophers of science of the 20th century...
NationalityAustrian
ProfessionPhilosopher
Date of Birth28 July 1902
CountryAustria
Karl Popper quotes about
freedom reason plans
We must plan for freedom, and not only for security, if for no other reason than only freedom can make security more secure.
freedom thinking victory
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.
gratitude religious talking
I don't know whether God exists or not. ... Some forms of atheism are arrogant and ignorant and should be rejected, but agnosticism—to admit that we don't know and to search—is all right. ... When I look at what I call the gift of life, I feel a gratitude which is in tune with some religious ideas of God. However, the moment I even speak of it, I am embarrassed that I may do something wrong to God in talking about God.
facts different theory
I have spoken to Einstein and he admitted to me that his theory was in fact no different from the one of Parmenides.
theory
A theory that explains everything, explains nothing
attitude believe successful
A system such as classical mechanics may be 'scientific' to any degree you like; but those who uphold it dogmatically - believing, perhaps, that it is their business to defend such a successful system against criticism as long as it is not conclusively disproved - are adopting the very reverse of that critical attitude which in my view is the proper one for the scientist.
mean winning games
Bold ideas, unjustified anticipations, and speculative thought, are our only means for interpreting nature: our only organon, our only instrument, for grasping her. And we must hazard them to win our prize. Those among us who are unwilling to expose their ideas to the hazard of refutation do not take part in the scientific game.
mean science judgement
Science is the century-old endeavour to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible. To put it boldly, it is the attempt at a posterior reconstruction of existence by the process of conceptualization. Science can only ascertain what is, but not what should be, and outside of its domain value judgements of all kinds remain necessary.
giving-up mean science
Is the world ruled by strict laws or not? This question I regard as metaphysical. The laws we find are always hypotheses; which means that they may always be superseded, and that they may possibly be deduced from probability estimates. Yet denying causality would be the same as attempting to persuade the theorist to give up his search; and that such an attempt cannot be backed by anything like a proof...
hate believe men
I do not overlook the fact that there are irrationalists who love mankind, and that not all forms of irrationalism engender criminality. But I hold that he who teaches that not reason but love should rule opens up the way for those who rule by hate. ( Socrates , I believe, saw something of this when he suggested that mistrust or hatred of argument is related to mistrust or hatred of man).
attitude littles firsts
We do not know anything - this is the first. Therefore, we should be very modest - this is the second. Not to claim that we do know when we do not - this is the third. That's the kind of attitude I'd like to popularize. There is little hope for success.
growth criticism way
Reason like science, grows by way of mutual criticism; the only possible way of planning its growth is to develop those institutions that safeguard. the freedom of thought
ideas grows new-ideas
What really makes science grow is new ideas, including false ideas.
philosophy philosophical roots
Genuine philosophical problems are always rooted outside philosophy and they die if these roots decay.