善于学习的人，能够透彻地知道事情的道理；善于实践的人，能够把事情疑难之处弄清楚。

In mathematics, the journey from question to answer is often more enlightening than the answer itself.

The spirit of a man is the most valuable thing in the world.

可信因果推断的关键不仅是方法，还有方法与当前问题的契合度。

成功不是幸福的关键，幸福才是成功的关键。

我创作得越多，就越发现自己。