梦魇是相信恐吓人们是刺激他们发奋的最好办法，或是环境越残酷，就会有越多人接受挑战。你必须想，你的理想父亲是怎样的？你的理想父亲往往是严厉又温和的，虽然这界限很难画定，我们社会需要的模范性人物是像一个理想父亲，不要走极端，不要完全集权、纯粹纪律，也不要模糊马虎，乱无规章。
The nightmare thought is that frightening people is the best way to get work out of them, and that somehow the crueler the environment, the more people will rise to the challenge. You want to think, who would you like as your ideal dad? And your ideal dad is somebody who is tough but gentle. And it's a very hard line to make. We need fathers, as it were, the exemplary father figures in society, avoiding the two extremes, which is the authoritarian disciplinarian on the one hand, and on the other, the lax, no-rules option.
如果你不愿意失败，你就没有准备好成功。
世界是一个阴谋，目的是不让你知道真相。
唯一比被人谈论更糟糕的事情是没有人谈论你。
我不想仅仅以网球选手的身份被人所知。我想以好人的身份被人所知。
The purpose of life is to live it, to taste experience to the utmost, to reach out eagerly and without fear for newer and richer experience.
努力成就了你。如果现在不全力以赴，总有一天会后悔。不要觉得为时已晚，继续努力吧。
喜剧最难的地方是让它看起来容易。
I'm not a self, I'm a spirit.
In the wild, you learn to appreciate the little things. They often make the biggest difference.
The method of psychology must be as exact as the methods of the natural sciences.
想到自己可能成为从世界上消除最大灾难之一的工具，同时怀有享受独立、家庭和平与幸福的希望，这种喜悦常常如此强烈，以至于在草地上研究我喜爱的课题时，我有时会陷入一种遐想。