"I have never been interested in making money. I have always been interested in doing physics."

"I have been very lucky in my life, because I have always been able to do what I love."

"Never make anything more accurate than it needs to be."

"Before I came here I was not only a little confused about the subject, but also had some doubts about my confusion."

"The fundamental problem is to find out if we can make a chain reaction go. If we can, then we have a new source of power. If we can't, then we don't."