The personal is not private; it is political.

在年老之后，你会发现自己的双手能解决很多难题。一只手用来帮助自己，另一只用来帮助别人。

We don't inherit the earth from our ancestors; we borrow it from our children.

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

In the end, we are all just stories.

没有解决方案。只有取舍选择。

我曾经整天不吃饭，整夜不睡觉，去苦苦思索，结果没有益处，还不如去学习。