I used to think the world was broken down by tribes. Then I thought it was broken down by rich and poor. Then I thought it was broken down by stupid and smart. But I know now that it is broken down by people who are alive and people who are dead.

记忆是一种抵抗形式。

创新往往源于对现状的质疑。

数学是神与人类交谈的语言。

实现明天的唯一限制是我们今天的疑虑。