所有老人共同的大秘密是，在七八十年里，你真的没有改变。你的身体变了，但你一点都没变。

Sustainable infrastructure should balance economic, social and environmental benefits.

每一次失败都离答案更近一步。

The main task in life is simply this: to identify and separate matters so that I can say clearly to myself which are externals not under my control, and which have to do with the choices I actually control.

写作是一种乐观的行为。