Even if you don't believe in God, you still have to believe in something that gives meaning to your life, and shapes your sense of the world. Such a belief is religious.

You know, at times like this one feels, well, perhaps extinct animals should be left extinct.

Increasingly, the mathematics will demand the courage to face its implications.

In science, the old men are usually wrong. But in politics, the old men are wise, counsel caution, and in the end are often right.

Writing a book is a bit like going on location for a movie. You're absent from your life, your family, and your friends. You're psychologically gone, so you might as well be physically gone.

Do you want to understand how to swim, or do you want to jump in and start swimming? Only people who are afraid of the water want to understand it. Other people jump in and get wet.

If you don't know history, then you don't know anything. You are a leaf that doesn't know it is part of a tree.