People may come along and argue philosophically that they like one better than another; but we have learned from much experience that all philosophical intuitions about what nature is going to do fail.

Once we were driving in the midwest and we pulled into a McDonald's. Someone came up to me and asked me why I have Feynman diagrams all over my van. I replied, "Because I am Feynman!" The young man went, "Ahhhhh!"

The game I play is a very interesting one. It's imagination, in a tight straightjacket.

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.

Today's brains are yesterday's mashed potatoes.

I was born not knowing and have had only a little time to change that here and there.

If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size of the original apple.