The closer you are to death, the more alive you feel. It's a wonderful way to live. It's the only way to live.

The key to credible causal inference is not just the method, but how well the method fits the question at hand.

过去不是负担，而是建立的基础。

The truth is rarely pure and never simple.

不经过一年中最寒冷的时候，无法知道松柏是最后凋谢的；不经过艰难的考验，无法知道一个人是不是真正的君子。