每一次挫折都是为了卷土重来。

In a world of constant change, adaptability is the key to survival and growth.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

解决一个数学问题就是揭开宇宙拼图的一块。

在年老之后，你会发现自己的双手能解决很多难题。一只手用来帮助自己，另一只用来帮助别人。