227 Quotes by Karl Popper

Theology, I still think, is due to lack of faith.

I wish to make it clear that ‘history’ in the sense in which most people speak of it simply does not exist; and this is at least one reason why I say that it has no meaning.

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.

The way of science is paved with discarded theories which were once declared self-evident;.

The quest for precision is analogous to the quest for certainty and both – precision and certainty are impossible to attain.

The essential feature of dualist-interactionism is that the mind and brain are independent entities... and that they interact by quantum physics.

Great men may make great mistakes;.

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.

Again, we cannot search the whole world in order to make sure that nothing exists which the law forbids. Nevertheless, both kinds of strict statements, strictly existential and strictly universal, are in principle empirically decidable, each, however, in one way only: they are unilaterally decidable. Whenever it is found that something exists here or there, a strictly existential statement may thereby be verified, or a universal one falsified.