Karl Popper

“Our knowledge can only be finite, while our ignorance must necessarily be infinite.”

“No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.”

“Aestheticism and radicalism must lead us to jettison reason, and to replace it by a desperate hope for political miracles. This irrational attitude which springs from intoxication with dream...”

“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.”

“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”

“It has always been asked in the spirit of: ‘What are the best sources of our knowledge – the most reliable ones, those which will not lead us into error, and those to which we can and must t...”

“Science may be described as the art of systematic oversimplification.”

“The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know; our knowledge of our ignorance. For...”

“We all have an unscientific weakness for being always in the right, and this weakness seems to be particularly common among professional and amateur politicians. But the only way to apply so...”

“There is no history of mankind, there are only many histories of all kinds of aspects of human life. And one of these is the history of political power. This is elevated into the history of...”

“We have become makers of our fate when we have ceased to pose as its prophets.”

“Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology.”

“Science may be described as the art of systematic over-simplification.”