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一个人能遭受的最痛苦的痛苦是洞察很多却无能为力。
The worst pain a man can suffer is to have insight into much and power over nothing.
The only thing that separates successful people from the ones who aren't is the willingness to work hard.
递归是计算的根源,因为它需要时间来描述。
对称性是降低复杂性的概念(协同例程包括子例程);到处寻找它。
贪心不足蛇吞象,知足才能心安。  
The teacher should not teach as if he were pouring knowledge into an empty vessel, but rather as if he were lighting a fire.
The past is not a shadow but a living presence.
That's exhilarating if you're doing well, and very crushing if you're not. It leads, in the worst cases -- in the analysis of a sociologist like Emil Durkheim -- it leads to increased rates of suicide. There are more suicides in developed, individualistic countries than in any other part of the world. And some of the reason for that is that people take what happens to them extremely personally -- they own their success, but they also own their failure.