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The more you give, the more you receive.
The young do not know enough to be prudent, and therefore they attempt the impossible, and achieve it, generation after generation.
关于教育的斗争不仅仅是关于知识的斗争,也是关于身份、欲望和未来本身的斗争。
一种善行没有内心的支持就不会长久,一种行为如果得不到自身的了解就无法树立。 
The only person you should try to be better than is the person you were yesterday.
对黑洞的研究彻底改变了我们对空间和时间的理解。