在一个国家中，一个公民的自由就是所有人的自由。

The future belongs to those who believe in the beauty of their dreams.

有人问我什么是幸福，我回答说：不奢求非必需之物。

I don't believe in pure art.

We are all products of chance and necessity.

In computational complexity, we are not just dealing with the limits of what we can compute, but also with the limits of what we can prove.