We can be hindered in our development and our personal growth by political conditions. Outer circumstances can constrain us. Only when we are free to develop our innate abilities can we live as free beings. But we are just as much determined by inner potential and outer opportunities as the Stone Age boy on the Rhine, the lion in Africa, or the apple tree in the garden.

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.

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.

Maybe we can comprehend a flower or an insect, but we can never comprehend ourselves. Even less can we expect to comprehend the universe.

It takes billions of years to create a human being. And it takes only a few seconds to die.

Philosophy is the opposite of fairy tales

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.