"The great challenge of quantum theory is not to understand how it works, but to accept that it works."

"The human spirit is capable of reaching for the stars."

"The only way to avoid error is to acquire experience, and the only way to acquire experience is to make errors."

"We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct."

"A physicist is just an atom's way of looking at itself."