如果你和你的竞争对手做的事情本质上是一样的，你可能不会太成功。

God says to man ,“I heal you,therefore I hurt;love you，therefore I punish.”

"Illustrations should whisper secrets to the reader, not shout the obvious."

我有一个非常简单的想法，如何变富。第一，花得比赚得少；第二，明智地投资差额。

Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.

心理学唯一有效的数据是受过训练的观察者的报告。