If you lined up all the cars in the world end to end, someone would try to pass them.

We each exist for but a short time, and in that time explore but a small part of the whole universe

There is a real danger that computers will develop intelligence and take over. We urgently need to develop direct connections to the brain so that computers can add to human intelligence rather than be in opposition.

It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.

I am discounting the reports of UFOs. Why would they appear only to cranks and weirdos?

I’m the archetype of a disabled genius, or should I say a physically challenged genius, to be politically correct. At least I’m obviously physically challenged. Whether I’m a genius is more open to doubt.

It often happens that I have an idea, but then I try to fill in the intermediate steps and find they don't work, so I have to give it up.