It is by no means certain that we advance our philosophical quest by reading Plato or Aristotle. It may increase our knowledge of history but not of the world.

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.

And although I have seen nothing but black crows in my life, it doesn't mean that there's no such thing as a white crow. Both for a philosopher and for a scientist it can be important not to reject the possibility of finding a white crow. You might almost say that hunting for 'the white crow' is science's principal task.

I wrote Sophies World in three months, but I was only writing and sleeping. I work for 14 hours a day when Im working on a book.

I have gone around observing your activities from the outside. Because of this I have also been able to see things to which you have been blind... Every morning you have gone to work, but you have never been fully awake. Of course, you have seen the sun and the moon, the stars in the sky, and everything that moves, but you haven't really seen it at all. It is different for the Joker, because he was put into this world with a flaw: He sees too clearly and too much.

You might say that the very best that can happen is to have energetic opponents.

The sophists were as a rule men who had traveled widely and seen different forms of government. Both conventions and local laws in the city-states could vary widely. This led the Sophists to raise the question of what was natural and what was socially induced. By doing this, they paved the way for social criticism in the city-state of Athens.