数学的研究是所有智力和精神进步不可或缺的基础。

You cannot always control what goes on outside. But you can always control what goes on inside.

事实上，把人看透并不是生活的全部。把人看错才是生活，一错再错，然后经过仔细的重新考虑，再次看错。

别错过机会，人生比你想象中的要短。

The art of leadership is saying no, not yes. It is very easy to say yes.