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

When things are going well, something will go wrong. / When things just can't get any worse, they will. / Anytime things appear to be going better, you have overlooked something.

Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on.

Thank you very Much, I enjoyed myself

Philosophy of science is about as useful to scientists as ornithology is to birds.

It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.

The game I play is a very interesting one. It's imagination in a straightjacket, which is this: that it has to agree with the known laws of physics. ... It requires imagination to think of what's possible, and then it requires an analysis back, checking to see whether it fits, whether its allowed, according to what's known, okay?