I do not believe in a personal God.

Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war, a genetically engineered virus or other dangers. I think the human race has no future if it doesn't go into space. I therefore want to encourage public interest in space.

I enjoy all forms of music - pop, classical and opera.

I want my books sold on airport bookstalls.

I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

If you are lucky enough to find love, remember it is there and don't throw it away.

Work gives you meaning and purpose and life is empty without it.