数学是理性的音乐。

创新不是对每件事都说“是”，而是对除最关键功能外的一切说“不”。

今天对自由民主最严重的威胁不是来自外部，而是来自内部。

"The past is always tense, the future perfect."

While you invent， don't select. While you sketch， don't inspect. While you write the first draft， don't reflect.

If a Nation expects to be ignorant and free in a state of civilization,it expects what never was and never will be....If we are to guard against ignorance and remain free,it is the responsibility of every American to be informed."

要学会控制投资风险，使用适当的风险管理工具。