"A good scientist is a man with an original mind who can think straight, but who also has a practical sense of what is possible."

"I'm not interested in living in a world without space travel."

"I'm a rocket man, not a religious man."

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

"I am a firm believer in the power of the human spirit."