Many of the Nazis were convicted after the war, but they were not convicted for being 'unreasonable'. They were convicted for being gruesome murderers.

Over the entrance to the temple at Delphi was a famous inscription: KNOW THYSELF! It reminded visitors that man must never believe himself to be more than mortal - and that no man can escape his destiny.

Socrates himself said, 'One thing only I know, and this is that I know nothing.' Remember this statement, because it is an admission that is rare, even among philosophers. Moreover, it can be so dangerous to say in public that it can cost you your life. The most subversive people are those who ask questions. Giving answers is not nearly as threatening. Any one question can be more explosive than a thousand answers.

The stupidest thing she knew was for people to act like they knew all about the things they knew absolutely nothing about.

Only philosophers embark on this perilous expedition to the outermost reaches of language and existence. Some of them fall off, but others cling on desperately and yell at the people nestling deep in the snug softness, stuffing themselves with delicious food and drink. 'Ladies and Gentlemen,' they yell, 'we are floating in space!' But none of the people down there care.

We do not believe in the notion of God's chosen people. We laugh at this people's fancies and weep over its misdeeds. To act as God's chosen people is not only stupid and arrogant, but a crime against humanity. We call it racism.

Then you have a big problem, because a human is a thinking animal. If you don't think, you're not really a human.