永远不要停止质疑如何做得更好——自满是进步的敌人。

It’s not about being able to do something, it’s about being able to do it well.

I always tell my students that it's okay to make mistakes, as long as you learn from them.

当市场下跌时，你轻易的将好东西打折变卖，但是一旦市场向上，再想买回来，难之又难。