你不仅要相信自己，还要相信你所做的事情。

I don't have to prove anything to anyone. There's nothing to prove.

We are all made of star-stuff, and through physics, we seek to understand our origins.

The only way to do great work is to love what you do.

如果一个国家期望在国民无知的情况下却拥有自由，那么这种期望无论在历史上，还是未来都绝不会实现。如果我们打算抵御无知和捍卫自由，每位美国人都有责任了解一件公共事务的来龙去脉。