"The best books are the ones that leave you a little bit different than when you started."

In business, if you're not failing occasionally, you're not trying hard enough.

"The difference between correlation and causation is fundamental in empirical work."

解析：真正正直的人外表反似委曲随和；真正聪明的人，不显露自己，从表面看，好像笨拙；真正有口才的人表面上好像嘴很笨。