"I would rather be ignorant and learn, than be learned and not know."

"Science is a way of thinking much more than it is a body of knowledge."

"The history of science is full of examples of people who thought they knew everything, and then discovered that they knew very little."

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

"It is not good to try to stop knowledge from going forward. Ignorance is never better than knowledge."