"The highest forms of understanding we can achieve are laughter and human compassion."

"You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird. You'll only know about humans in different places a…"

"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."

"You know, the most amazing thing happened to me tonight... I saw the brightest star in the sky. And it was moving!"

"Fiddling is the answer. Experimenting is fiddling around. It's not an organized program, elegance — it's impossible. I noticed it."