The spread of liberal democracy around the world is not inevitable, but it is the most likely outcome.

When I was in college， I wanted to be involved in things that would change the world.

失败是有趣的——它是进步的一部分。你永远不会从成功中学到东西，但你会从失败中学到东西。

在数学中，解决问题的旅程与解决方案本身同样重要。

成功是准备遇到机会的时刻。