The more you know who you are, and what you want, the less you let things upset you.

所以大国攻打小国，那是互相残害，大国的错误必然反过来使其本国受害。 

"The power of a story is that it can change how we see ourselves and others."

The joy of mathematics comes from the struggle to understand.

在像水泥这样传统的行业中，颠覆是进步的唯一途径。