哪里有喧哗，哪里就没有真正的知识。

"Causal inference requires careful thought about the assumptions underlying your analysis."

I think it's important to have a good hard failure when you're young... I learned a lot from that. Because it makes you kind of aware of what can happen to you. Because of it, I've never had any fear in my whole life when we've been near collapse and so on. I've never been afraid.

Every tree planted today is a legacy for tomorrow's generations.

The most durable thing in writing is style, and style is the most valuable investment a writer can make with his time.

在原子世界中，数学语言是唯一可以使用的语言。