"I don't believe in the idea of a 'good' or 'bad' atom. I just believe in atoms."

"You see my physics students don't understand it... That is because I don't understand it. Nobody does."

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

"I'm not a serious fellow."

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