做自己,不要为了讨好别人而改变自己。
Be yourself, don't change yourself to please others.
A mathematical truth is universal and eternal.
释义:不考虑在安逸的环境中要想到危难,用节俭来戒除奢侈,不使自己的道德处于深厚的境界,不能使自己的情欲战胜物质欲望,这就像砍伐树木的根却想要树木长得茂盛,堵塞水的源头却想要水流得长远一样荒谬。 
The pursuit of mathematical knowledge is a journey that never ends; there is always more to discover and understand.
If you want something you've never had, you must be willing to do something you've never done.