We simply don't know yet what's going to happen to the carbon in the atmosphere.

That's what I learned from World War II. Things are always more complicated than most people believe.

We have these amazing gifts of music and mathematics and painting and Olympic running. I mean, we're the animal that is best of all the animals at long-distance running. Why? It is quite amazing. Superfluous gifts you don't really need to survive.

Many of the technologies that are now racing ahead most rapidly, replacing human workers in factories and offices with machines, making stockholders richer and workers poorer, are indeed tending to accentuate the existing inequalities in the distribution of wealth.

Everything in my life was luck.

I'm happy that I've raised six kids, and not one of them is a Ph.D.

[John Wheeler] rejuvenated general relativity; he made it an experimental subject and took it away from the mathematicians