A hundred times every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving...

一段不幸的婚姻不是缺乏爱，而是缺乏友谊。

一个问题如果在计算机上可以快速解决，那么它属于P类问题；如果一个解可以快速验证，那么它属于NP类问题。

我不喜欢压力。我不喜欢债务。我不喜欢担心。所以我尽量买足够便宜的东西，这样如果它们不奏效，我也不会损失太多。