面对各种诱惑而能拒之于外，这才是聪明之举；面对艰难坎坷而能站得稳，这才是意志坚定。

Time is a river that flows backward as much as it flows forward.

The only constant in life is change.

The most dangerous phrase in the language is, 'We've always done it this way.'

数学中最重要的是理解概念，而不仅仅是记忆公式。

There is no despair so absolute as that which comes with the first moments of our first great sorrow, when we have not yet known what it is to have suffered and be healed, to have despaired and have recovered.

理解一种文化的最好方法是阅读它的故事。