忠诚就是一切。没有它，你一无所有。

定理是永恒的；它们的证明是短暂的。

我不怕被误解，因为时间会证明一切。

"The only real elegance is in the mind; if you've got that, the rest really comes from it."

I don't believe in perfection. I think that's a very dangerous idea. It's a very unattainable idea.

I think of myself as somebody who from an early age knew I was resposible for myself， and I had to make good.