Scientifically speaking, a butterfly is at least as mysterious as a superstring. When something ceases to be mysterious it ceases to be of absorbing interest to scientists. Almost all things scientists think and dream about are mysterious.

So long as you have courage and a sense of humor, it is never too late to start life afresh.

If we want to go to space with humans, that's for fun not for science. Human adventures in space are just sporting events.

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

Mathematics is really an art, not a science.

I think the biggest misconception is that everybody has to learn mathematics. That seems to be a complete mistake.

Technology without morality is barbarous; morality without technology is impotent.