你的热情应该大于你的恐惧。

为了得到永生，一个人必须付出昂贵的代价；一个人必须在活着的时候死去多次。

I prefer to supervise the whole operations of the government myself rather than entrust the public business to subordinates.

工具变量的美妙之处在于它们让我们以新的视角看世界。

Every portrait that is painted with feeling is a portrait of the artist, not of the sitter.