一个最重大的错误，是以动机而不是结果来判断政策的得失。
One of the great mistakes is to judge policies and programs by their intentions rather than their results.
改变世界的阻碍，并非人类的冷漠，而是世界实在太复杂。
学习本质上是刺激-反应连接的问题。
敞开心扉。有人会来。有人会来找你的。
The only thing of value is the thing you cannot buy.
