It may be unfair, but what happens in a single day can change the course of a whole lifetime.
也许不公平，但一天发生的事情，有时会改变一个人的一生。
There are some things so serious you have to laugh at them.
大海不拒绝各种各样的水，所以才能成就它的博大；大山不拒绝形形色色的土石，所以才能成就它的高峻；贤明的君主不嫌弃百姓，所以能够聚集众多的臣民；读书人不厌倦学习，所以能达到圣贤的境界。
Mathematics is not just a tool; it is a way of thinking.
过去就是过去，它属于那里。