Was everyone else really as alive as she was?... If the answer was yes, then the world, the social world, was unbearably complicated, with two billion voices, and everyone’s thoughts striving in equal importance and everyone’s claim on life as intense, and everyone thinking they were unique, when no one was. One could drown in irrelevance.
计算复杂性的本质是理解什么可以被有效地计算的极限。
To understand a program you must become both the machine and the program.