The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
所有模型都是错误的，但有些是有用的。
你今天感受到的痛苦将是你明天感受到的力量。
The man who writes about himself and his own time is the only man who writes about all people and about all time.
