当一个人做出彻底的蠢事，那通常是出于最高尚的动机。

"The power of words is that they can change the world."

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

The stranger is an element of the group itself, not unlike the poor and sundry 'inner enemies'—an element whose membership within the group involves both being outside it and confronting it.

那些能够忍受命运最糟糕打击的人，往往是最坚强的人。

——《在上海南京路同盟会机关的演说》（1912年4月16日）