The child is not a passive recipient of knowledge but an active participant in the learning process.

一个力学问题只有被简化为代数问题时才算解决。

Writing is the only way I can breathe.

不去尝试办不到的事情, 不去追求得不到的东西, 不居于不能持久的地位, 不推行不可重复的政策。

真相很少是纯粹的，也从不简单。

I don't try to predict the market. I just try to buy stocks that are cheap and hold them for the long term.