A state that does not educate and train women is like a man who only trains his right arm.

There exists a world. In terms of probability this borders on the impossible. It would have been far more likely if, by chance, there was nothing at all. Then, at least, no one would have began asking why there was nothing.

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.

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've nothing against eye make-up and lipstick. But the fact is that we’re actually living on a planet in space. For me that’s an extraordinary thought. It’s mind-boggling just to think about the existence of space at all. But there are girls who can’t see the universe for eye liner.

the very best that can happen is to have energetic opponents. The more extreme they become, the more powerful the reaction they will have to face.

Moreover, nature's blocks had to be eternal-because nothing can come from nothing.