数学家的工作是在别人看到混乱的地方发现模式。

我说不出这心为什么那样默默地颓丧着。是为了它那不曾要求、不曾知道、不曾记得的小小的需要。

You’ve got to have models in your head. And you’ve got to array your experience—both vicarious and direct—on this latticework of models. You may have noticed students who just try to remember and pound back what is remembered. Well, they fail in school and in life. You’ve got to hang experience on a latticework of models in your mind.

书籍是反映我们梦想的镜子。

中国的崛起对自由民主秩序构成了重大挑战。