是故非子之所能备。彼一时也，此一时也，岂可同哉？这不是你能理解的。
此一时，彼一时也，怎么能一概而论呢？
如果我们知道我们在做什么，那么这就不叫科学研究了；不是吗？
I'm not a person who gives up on my strength.
If you say you want to automate cars and save people’s lives, the skills you need for that aren’t taught in any particular discipline. I know – I was interested in working on automating cars when I was a Ph.D. student in 1995.
Every ending is a new chapter.
The more you dwell in the past, the less you prepare for the future.
智者从敌人身上学到的比愚者从朋友身上学到的更多。