One man's ways may be as good as another's, but we all like our own best.

When in doubt, don't.

People love our products. They love using our services. All of this, to me, equals great opportunity.

I'm not as famous as Stephen Hawking, but certainly in the U.S., I have a very high profile for a scientist. It is an awesome responsibility, one that I don't shoulder lightly.

I can walk into a bookshop and point out a number of books that I find very unattractive in what they say. But it doesn't occur to me to burn the bookshop down. If you don't like a book, read another book. If you start reading a book and you decide you don't like it, nobody is telling you to finish it.