The causal approach is about understanding the mechanisms that generate the data.

The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

真相有时是残酷的。

The bitterest creature under heaven is the wife who discovers that her husband's bravery is only bravado.

Never underestimate the power of a team that believes in its mission.

成功不在于你拥有多少资源，而在于你如何利用现有的资源。