If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

数学的美在于它是一种可以以其他任何方式都无法描述宇宙的语言。

处于逆境中，就好比周身都扎着针、敷着药；冥冥中却能磨炼人的意志、培养高尚的品行。处于顺境中，就好比被各种各样的兵器包围；冥冥中掏空了身体，消磨了向上进取的意志。

不断思考你如何能做得更好，并不断质疑自己。