Winning a Nobel Prize is no big deal, but winning it with an IQ of 124 is really something.

I don't feel frightened by not knowing things.

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."

There are 10^11 stars in the galaxy. That used to be a huge number. But it's only a hundred billion. It's less than the national deficit! We used to call them astronomical numbers. Now we should call them economical numbers.

Science is what we have learned about how to keep from fooling ourselves.

When a scientist doesn't know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty darn sure of what the result is going to be, he is in some doubt.

The electron is a theory. But the theory is so good we can almost consider them real.