Don't pay attention to "authorities," think for yourself.

I'm smart enough to know that I'm dumb.

Experiment is the sole judge of the validity of any idea.

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!"

Maybe that is why young people make success. They don't know enough.

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.

Work as hard and as much as you want to on the things you like to do the best.