书是一面镜子：如果一只猿猴往里看，不太可能看出使徒的模样。
The truth is rarely pure and never simple.
The Lisp language is designed to be extensible, and it is easy to add new features to it.
The key to success is to get out into the store and listen to what the associates have to say. It's terribly important for everyone to get involved. The best ideas come from the floor.
数学研究是所有自然现象精确知识不可或缺的基础。
成功的关键是走进商店，听听员工们怎么说。每个人都参与进来是非常重要的。最好的想法来自基层。
I'm not perfect, but I'm trying every day.
