Look at me.We all have marks on our face. I have this wrinkle here from your first surgery.I have these wrinkles here from your last surgery. This is the map that shows us where we’ve going.And this is the map that shows us where we’ve been.And it’s never ever ugly.

追根究底，我们最基本的共同联系是我们都生活在这个小型行星。我们都呼吸着相同的空气。我们都珍惜我们孩子的未来。我们都是凡人。

The poet is the mirror of the world’s sorrow.

数学不是关于数字、方程、计算或算法的：它是关于理解的。