"We have to learn to live with the uncertainty and the ambiguity of the atomic age."

"When you see something that is technically sweet, you go ahead and do it and you argue about what to do about it only after you have had your technical success. That is the way it was with the atomic …"

"It is not possible to be a scientist unless you believe that it is good to learn. It is not possible to be a scientist unless you believe that it is of the highest value to learn."

"It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them."

"The atomic bomb has taught us that we are not masters of our own destiny."