"It is not enough to know how to build a bomb. One must also know how to control it."

"The only way to learn physics is to do physics."

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

"Before the war, I was doing pure physics. Now I am doing applied physics. But it is still physics."

"I have been very lucky in my life. I have always been able to do what I wanted to do, and I have always been able to do it with people I liked."