Quotes by Karl Popper

Good tests kill flawed theories; we remain alive to guess again. (Karl Popper)

In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality. (Karl Popper)

It is impossible to speak in such a way that you cannot be misunderstood. (Karl Popper)

No rational argument will have a rational effect on a man who does not want to adopt a rational attitude. (Karl Popper)

Our knowledge can only be finite, while our ignorance must necessarily be infinite. (Karl Popper)

Philosophers should consider the fact that the greatest happiness principle can easily be made an excuse for a benevolent dictatorship. We should replace it by a more modest and more realistic principle - the principle that the fight against avoidable misery should be a recognized aim of public policy, while the increase of happiness should be left, in the main, to private initiative. (Karl Popper)

Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology. (Karl Popper)

Science must begin with myths, and with the criticism of myths. (Karl Popper)

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 the world. (Karl Popper)

Those who promise us paradise on earth never produced anything but a hell. (Karl Popper)