Physicists like to think that all you have to do is say, these are the conditions, now what happens next?

Have no respect whatsoever for authority; forget who said it and instead look what he starts with, where he ends up, and ask yourself, "Is it reasonable?"

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

I think a power to do something is of value. Whether the result is a good thing or a bad thing depends on how it is used, but the power is a value.

It is the fact that the electrons cannot all get on top of each other that makes tables and everything else solid.

If you think you understand quantum mechanics, you don't understand quantum mechanics.

There’s so much distance between the fundamental rules and the final phenomenon, that it’s almost unbelievable that the final variety of phenomenon can come from such a steady operation of such simple rules.