No rational argument will have a rational effect on a man who does not want to adopt a rational attitude.
Karl PopperThere 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 the world.
Karl PopperI have come to the conclusion that Darwinism is not a testable scientific theory, but a metaphysical research programme.
Karl PopperThe scientific tradition is distinguished from the pre-scientific tradition by having two layers. Like the latter, it passes on its theories; but it also passes on a critical attitude towards them.
Karl Popper