好的计量经济学就像好的木工——关键在于为工作使用正确的工具。

人生四然：来是偶然，去是必然，尽其当然，顺其自然。

"A book is a mirror: if an ape looks into it, an apostle is unlikely to look out."

In the end, what matters is not the answers we find, but the questions we dare to ask.