When you don’t know how much to pay someone for a particular task， ask them “what would be fair” and their answer usually is.

My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

在这个不断试图改变你的世界里，做你自己是最大的成就。

There is no such thing as society: there are individual men and women, and there are families.