In the wild, there are no second chances. You have to get it right the first time.

It is a common experience that a problem difficult at night is resolved in the morning after the committee of sleep has worked on it.

比起知识本身，我对能用知识做什么更感兴趣。

——从浙江观潮返上海后题词，1916年9月15日

唤醒天才的是困难。