There should be no boundaries to human endeavor. However bad life may seem, there is always hope.

Everyone can enjoy a life of luxurious leisure if the machine-produced wealth is shared, or most people can end up miserably poor if the machine-owners successfully lobby against wealth redistribution.

[On President Bush's plan to get to Mars in 10 years] Stupid. Robots would do a better job and be much cheaper because you don't have to bring them back.

I want my books sold on airport bookstalls.

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.

Scientists have become the bearers of the torch of discovery in our quest for knowledge.

I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.