小人办事，处理的原则是私利，合于私利的就看作利，违背私利的就看作害；君子办事，衡量的标准是道义，合于道义的就看作利，违反道义的就看作害。

The desire to write grows with writing.

What literature needs most to tell and investigate today are humanity's basic fears: the fear of being left outside, and the fear of counting for nothing, and the feelings of worthlessness that come with such fears.

数学不知道种族或地理界限；对于数学来说，文化世界是一个国家。