数学中最深刻的思想往往来自最简单的问题。

The things that we love tell us what we are.

Survival is not about being fearless. It's about making a decision, getting on and doing it, because you have to.

You can't be afraid of people willing to hurt you, because if you fear life, then you will never live.

地球的历史镌刻在它的岩石中。

But there is only one thing which gathers people into seditious commotion, and that is oppression.