唯一值得被称为自由的自由是追求我们自己的幸福，以我们自己的方式，只要我们不试图剥夺他人的自由，或妨碍他们争取幸福的努力。

We try to buy stocks selling at a discount from their asset value.

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."

数学中最深刻的思想往往来自最简单的问题。

I don't think about the past. The only thing that matters is the everlasting present.

对犯罪者的研究应从其头骨研究开始。