要理解一个程序，你必须同时成为机器和程序。
Water is the source of life and the force of destruction.
创造力需要放弃确定性的勇气。
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
Complexity is not just about the number of components in a system, but about the nature of their interactions.