"The soul is not a thing, it is a quality or aspect of a thing, and it is the quality of a thing that is most precious."

忠诚就是一切。没有它，你一无所有。

I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.

We don't inherit the earth from our ancestors; we borrow it from our children. This principle guides every step we take.