The art of economics lies in understanding the subtle interactions between rules and behavior.

The best way to optimize a program is to optimize it.

我不相信完美。我认为那是一个非常危险的想法。那是一个非常难以实现的想法。

Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.

Nature has placed mankind under the governance of two sovereign masters， pain and pleasure.

插图不仅仅是装饰；它们是讲故事不可或缺的一部分。