The goal of mathematics is to make the simple complicated, and the complicated simple.
Man is an animal that makes bargains: no other animal does this no dog exchanges bones with another.
人是一种做交易的动物，没有其他动物会这样做，没有狗会和另一只狗交换骨头。
The method of introspection must be rigorously controlled.
"Words are the mirrors of our thoughts."
世界是一个非常复杂的地方，而且它并没有变得简单。
骑着马迎风而行，看人生的起伏变化；高声歌唱书写风景，笑看天地的荒凉与衰老。