It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!

I think the next [21st] century will be the century of complexity. We have already discovered the basic laws that govern matter and understand all the normal situations. We don't know how the laws fit together, and what happens under extreme conditions. But I expect we will find a complete unified theory sometime this century. The is no limit to the complexity that we can build using those basic laws.

Doing a job RIGHT the first time gets the job done. Doing the job WRONG fourteen times gives you job security.

The human capacity for guilt is such that people can always find ways to blame themselves

Children in backseats cause accidents. Accidents in backseats cause children.

Eternity is a long time, especially towards the end.

I'm very interested in film making. It's telling a story, fiction or non-fiction. I have been filmed quite a lot. Contrary to popular belief, filming isn't glamorous. It can be wearingly repetitious, as the same shot is taken over and over again.