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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。
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。