The war of ideas is a Greek invention. It is one of the most important inventions ever made. Indeed, the possibility of fighting with with words and … - Karl Popper

The fascist appeal to ‘human nature’ is to our passions, to our collectivist mystical needs, to ‘man the unknown’. Adopting Hegel’s words just quoted, this appeal may be called the cunning of the revolt against reason. But the height of this cunning is reached by Hegel in this boldest dialectical twist of his. While paying lip-service to rationalism, while talking more loudly about ‘reason’ than any man before or after him, he ends up in irrationalism; in an apotheosis not only of passion, but of brutal force: ‘It is’, Hegel writes, ‘the absolute interest of Reason that this Moral Whole’ (i.e. the State) ‘should exist; and herein lies the justification and merit of heroes, the founders of States — however cruel they may have been … Such men may treat other great and even sacred interests inconsiderately … But so mighty a form must trample down many an innocent flower; it must crush to pieces many an object on its path.

To be ignorant of the past is to remain a child.

A rationalist is simply someone for whom it is more important to learn than to be proved right; someone who is willing to learn from others - not by simply taking over another's opinions, but by gladly allowing others to criticize his ideas and by gladly criticizing the ideas of others