I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first. I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.

If time travel is possible, where are the tourists from the future?

The progress of the human race in understanding the universe has established a small corner of order in an increasingly disordered universe.

Nothing is fool-proof to a sufficiently talented fool.

We see the universe the way it is because we exist.

It matters if you don't just give up.

There is a real danger that computers will develop intelligence and take over.