Every science begins as philosophy and ends as art.

To say nothing, especially when speaking, is half the art of diplomacy.

There have been only 268 of the past 3,421 years free of war.

We Americans are the best informed people on earth as to the events of the last twenty-four hours; we are the not the best informed as the events of the last sixty centuries.

I do not think psychoanalysis has a scientific basis. If we can't explain why a cockroach decides to turn left, how can we explain why a human being decides to do something?

We need to get across the excitement and creativity of science. That it isn't just a list of facts that have already been discovered - but a process, a creative project, that you are generating ideas, testing them and looking for evidence.

The space station here is a magical place and an incredible science facility.

I was never an A student. I never really liked going to school like many of my friends. There were just too many students and too competitive. We were sort of forced into studying to go to college. It was like if we didn't go to college, society looked at us as failures. We didn't know what to do with the situation.