What would happen if we could arrange the atoms one by one the way we want them?

The world is a dynamic mess of jiggling things

No problem is too small or too trivial if we can really do something about it.

The basis of action on love, the brotherhood of all men, the value of the individual... the humility of the spirit.

We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."

Just as a poet often has license from the rules of grammar and pronunciation, we should like to ask for 'physicists' license from the rules of mathematics in order to express what we wish to say in as simple a manner as possible.

The whole question of imagination in science is often misunderstood by people in other disciplines. ... They overlook the fact that whatever we are allowed to imagine in science must be consistent with everything else we know.