No rational argument will have a rational effect on a man who does not want to adopt a rational attitude. - Karl R. Popper
Ich weiss, dass ich nichts weiss, und kaum das. - Karl R. Popper
Denying realism amounts to megalomania. - Karl R. Popper
While differing widely in the various little bits we know, in our infinite ignorance we are all equal. - Karl R. Popper
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 R. Popper
Always remember that it is impossible to speak in such a way that you cannot be misunderstood: there will always be some who misunderstand you. - Karl R. Popper
Science may be described as the art of systematic oversimplification. - Karl R. Popper
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 R. Popper