“...[C]ontrary to your Earth experience and its derived cynicism, on Mars, such things are possible. Yes, fully possible, even for you, a person who obviously was a complete social failure on Earth--otherwise you wouldn't be here.”

“A stupid person is a person who causes losses to another person or to a group of persons while himself deriving no gain and even possibly incurring losses.”

“Liberty is the possibility of doubting, the possibility of making a mistake, the possibility of searching and experimenting, the possibility of saying no to any authority - literary, artistic, philosophic, religious, social, and even political.”

“The problems of the world cannot possibly be solved by skeptics or cynics whose horizons are limited by the obvious realities. We need men who can dream of things that never were.”

“You only get one life. It's actually your duty to live it as fully as possible.”

“The secret of happiness is this: let your interest be as wide as possible and let your reactions to the things and persons who interest you be as far as possible friendly rather than hostile. ”