An ordinary fool isn't a faker; an honest fool is all right. But a dishonest fool is terrible!

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter.

We find that the statements of science are not of what is true and what is not true, but statements of what is known with different degrees of certainty: "It is very much more likely that so and so is true than that it is not true".

There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there ever was such a time ... On the other hand, I think I can safely say that nobody understands quantum mechanics.

Of course, you only live one life, and you make all your mistakes, and learn what not to do, and that's the end of you.

If there is something very slightly wrong in our definition of the theories, then the full mathematical rigor may convert these errors into ridiculous conclusions.

Some people think Wheeler's gotten crazy in his later years, but he's always been crazy.