When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

If all of mathematics disappeared, physics would be set back by exactly one week.

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

Science is uncertain.

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

Science is a way to teach how something gets to be known, what is not known, to what extent things are known (for nothing is known absolutely), how to handle doubt and uncertainty, what the rules of evidence are, how to think about things so that judgments can be made, how to distinguish truth from fraud, and from show.

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.