"There is no harm in doubt and skepticism, for it is through these that new discoveries are made."

"I have a great deal of difficulty with the idea of 'truth' in the philosophical sense."

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

"The game of science is to understand the world."

"I don't know anything, but I do know that everything is interesting if you look at it deeply enough."