"Basic research is what I am doing when I don't know what I am doing."

"We knew that we had created a new means of warfare, and the question as to what to do with it was a moral problem for the world, not for us."

"It would be the height of presumption to think that we are the only living things in that enormous immensity."

"The rocket will open the door to the universe."

"To achieve the impossible, you must first believe it is possible."