Quite a remarkable statement and I was reminded of this when I saw this cartoon.

非常精辟的阐述,每当我看到这张漫画我都能想起这段话

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

This is something I used to announce near the end, but then some people felt that it's not fair not to know this from the beginning.

这些话我以前都是在期末的时候说的,但后来有些同学反映,如果不在课程一开始知道这些会很不公平

耶鲁公开课 - 基础物理课程节选

By the way, I've never known whether it is a fact.

其实我也从来都不知道这句话这是不是真的。

耶鲁公开课 - 文学理论导论课程节选