To love is to see the invisible and to believe in the impossible.

Natural experiments are a powerful tool for understanding causal relationships in the real world.

The gritty individual approaches achievement as a marathon; his or her advantage is stamina.

你只能看到另一的人的2%，而他们只看到你的2%。围绕自己那隐藏的98%（真正的本性）去展开生活。

The best mathematics is simple, but not too simple.

We try to buy stocks that are selling below their book value.