计算机科学中最强大的工具不是计算机本身，而是人类的思维。
To be a slave in this world is very different from being a slave in another.
The act of writing is an act of faith—in language, in the reader, in oneself.
The power of a system comes from its ability to compose and decompose representations.
The present is the past rolled up for action, and the past is the present unrolled for understanding.