I would rather be right than rigorous.

I don't have much positive to say about motor neuron disease, but it taught me not to pity myself because others were worse off, and to get on with what I still could do. I'm happier now than before I developed the condition.

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.

There is a very real danger that we will kill everything on this planet now that we have the technological power to do so.

I have sold more books on physics than Madonna has on sex.

Simplicity is a matter of taste

Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.