你永远无法真正理解一个人，除非你从他的角度考虑问题。

There are no objects whose existence is indubitable.

数学中的每个问题都是一个等待解决的谜题，而乐趣就在于解决的过程。

Boundaries define us. They define what is me and what is not me. A boundary shows me where I end and someone else begins, leading me to a sense of ownership.

一个阅读的孩子永远会有一个朋友。

有时候生活会给你当头一棒。不要失去信心。