我们就是自己的恶魔，而且你我让这个世界成了自己的地狱。

以这样奢侈的国君，去统治那些爱好奢侈的臣民，想要国家不动乱，是不可能的。 

The language of mathematics is universal, and it is through this language that we can communicate the most profound truths of the universe.

We don't inherit the land from our ancestors; we borrow it from our children.

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.