“There are a dozen views about everything until you know the answer. Then there's never more than one.”

“As in arithmetic-there is only one right answer to a sum, and all other answers are wrong; but some answers are much nearer being right than others.”

“You never know how much you really believe anything until its truth or falsehood becomes a matter of life and death to you.”

“the greatest service we can do to education today is to teach fewer subjects. No one has time to do more than a very few things well before he is twenty, and when we force a boy to be a mediocrity in a dozen subjects, we destroy his standards, perhaps for life.”

“Perhaps civilization will never be safe until we care for something else more than we care for it. The hypothesis has certain facts to support it. As far as peace (which is one ingredient in our idea of civilization)is concerned, I think many would now agree that a foreign policy dominated by desire for peace is one of the many roads that lead to war.”

“Even in social life, you will never make a good impression on other people until you stop thinking about what sort of impression you're making.”

“And there's one thing about this underground work, we shan't get any rain.”