建筑不在于形式，而在于许多其他事物。

I used to think the world was broken down by tribes. Then I thought it was broken down by rich and poor. Then I thought it was broken down by stupid and smart. But I know now that it is broken down by people who are alive and people who are dead.

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

社交场中的闲逸令人厌恶的，因为它是被迫的；孤独生活中的闲逸是愉快的，因为它是自由的、出于自愿的。