变得快乐的技巧几乎完全不同于不悲伤的技巧。

To truly know the world, look deeply within your own being; to truly know yourself, take real interest in the world.

The theory of computation is not just about solving problems, but also about understanding the limits of what can be computed.

I want you to know， it isn’t always clear in the beginning because as I said I had been on television since I was 19 years old. But around ’94 I got really clear. So don’t expect the clarity to come all at once， to know your purpose right away.

在每个国家，最重要的是人民的教育。