John Koenig: We're all aliens, until we get to know one another.
John Koenig: A killer who can't be killed.
John Koenig: It's better to live as your own man than as a fool in someone else's dream.
Sandra Benes: Why has all of this happened to us, Professor?
Prof. Victor Bergman: The gods using us for their sport, perhaps?
John Koenig: If we understand others, in time, I believe, we come to understand ourselves.
Commander John Koenig: Now we're sitting on the biggest bomb man's ever made.
Balor: How can you value life if you do not fear death?
Helena Russell: With a history like that, who wants to go back to Earth anyway?
Answer: Not necessarily - The gravitational fields of Earth and the Sun could have deflected the moon away from the solar system.