重要的不是你说什么，而是你做什么。

在一个国家中，一个公民的自由就是所有人的自由。

The only limits that exist are the ones in your mind.

I find I'm so excited. I can barely sit still or hold a thought in my head. I think it the excitement only a free man can feel, a free man at the start of a long journey whose conclusion is uncertain. I hope I can make it across the border.I hope the Pacific is as blue as it has been in my dreams. I hope to see my friend, and shake his hand. I hope.

I think that the thing that makes mathematics worthwhile is the fact that it has this incredible structure that you can explore and discover.