I have learned more from Hayek than from any other living thinker, except perhaps Alfred Tarski - but not even excepting Russell.

We hate the very idea that our own ideas may be mistaken, so we cling dogmatically to our conjectures.

We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant.

Whenever we propose a solution to a problem, we ought to try as hard as we can to overthrow our solution, rather than defend it.

The attempt to make heaven on earth invariably produces hell.

The survival value of intelligence is that it allows us to extinct a bad idea, before the idea extincts us.

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 ideas instead of fighting with swords is the very basis of our civilization, and especially of all its legal and parliamentary institutions.