Over a very small number of rolls of the dice, the uncertainty principle is very important.

The fact that no one understands you doesn't mean you're an artist.

Using e-mail, I can communicate with scientists all over the world.

At times, I get very lonely because people are afraid to talk to me or don't wait for me to write a response. I'm shy and tongue-tied at times. I find it difficult to talk to people who I don't know.

Thirty years ago I was diagnosed with motor neurone disease, and given two and a half years to live. I have always wondered how they could be so precise about the half.

If you understand how the universe operates, you control it in a way.

I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents that can befall life on a single planet. But I'm an optimist. We will reach out to the stars.