成功不是关于成为最好的，而是关于让他人变得更好。

Love is the only reality, and it is not a mere sentiment. It is the ultimate truth.

你唯一应该努力超越的人，是昨天的自己。

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

一只眼睛不如两只眼睛看得明白，一只耳朵不如两只耳朵听得清楚。