每一个数学问题都是通向新理解世界的窗口。
Every mathematical problem is a window into a new world of understanding.
We must remember that in nature there are neither rewards nor punishments—there are consequences.
对所有人有礼,与多数人交际,和少数人亲近,交一位朋友,不与人为敌。
荣枯互为倚伏,心田开合一切由己,顺与逆顺其自然,何必去问别人?长与短,四时运行,长寿或短命,一切都是自然而成,何必去怪别人。