Every book is a journey, and every journey is a book.

The thing that we are trying to do at Facebook, is just help people connect and communicate more efficiently.

天下很多所谓可以做的事情，未必都是可以做的啊！ 

The beauty of mathematics lies in its ability to describe the universe in a language that transcends cultural and linguistic barriers.

孤独就是与众不同，与众不同就是孤独。

儿童教育是人类最重要的一个问题。