"We are limited only by our imagination and our will to act."

"Conquering the universe one has to solve two problems: gravity and red tape. We could have mastered gravity."

"I have never seen a rocket that didn't want to fly."

"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."

"During my visits in the Mittelwerk, I never saw a dead man nor did I ever see a beating or a killing."