晏子春秋

在远处防守不如在近处防守，把守太繁琐不如把守要塞，用常法把守不如用出奇制胜的方法，把守宽阔的地方不如把守狭窄的地方，在深处把守不如在浅处把守。

Nobody understands when a woman makes a choice to marry and have children, in one way her life begins, but in another way, it stops. You build a life of details, and you just stop and stay steady, so that your children can move.

数学是关于概念之间关系的科学，与这些概念的内容无关。