Writing is about making something, not about expressing yourself.

I don’t know how to explain it, but I feel like I was born to do this.

The best way to cheer yourself up is to try to cheer somebody else up.

The only secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards.

The power of mathematics lies in its generality and abstraction.

眼睛会欺骗人，双腿会累死人，但胃却专给人找麻烦！