Hang in there, retirement is only thirty years away!

So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.

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

I don't think the human race will survive the next thousand years, unless we spread into space.

No one undertakes research in physics with the intention of winning a prize. It is the joy of discovering something no one knew before.

Once I wept for I had no shoes. Then I met a man with no feet, so I took his shoes. I mean, it wasn't as if he was going to need them.

Chaos, when left alone, tends to multiply.