I think computer viruses should count as life ... I think it says something about human nature that the only form of life we have created so far is purely destructive. We've created life in our own image.

The downside of my celebrity is that I cannot go anywhere in the world without being recognized. It is not enough for me to wear dark sunglasses and a wig. The wheelchair gives me away.

Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.

[If] there were such a God, I would like to ask however did he think of anything as complicated as M-theory in eleven dimensions.