Sir Karl Popper, (1902-1993) Austrian-born British philosopher, academic and social commentator Share on Facebook Share on Twitter Comment on this quote Share via Email Print this Page [1-2] of 2 Sir Karl Popper quotesSir Karl Popper QuotesSir Karl Popper There is an almost universal tendency, perhaps an inborn tendency, to suspect the good faith of a man who holds opinions that differ from our own opinions… It obviously endangers the freedom and the objectivity of our discussion if we attack a person instead of attacking an opinion or, more precisely, a theory.~ Sir Karl Popper We must plan for freedom, and not only for security, if for no other reason than only freedom can make security more secure.~ Sir Karl Popper Share on Facebook Tweet Email Print