人将会死，国家会建立亦会倾颓；但思想将永远长存。思想可承受的远大过死亡。

The ultimate test of any economic theory is whether it improves real-world decisions.

When you are young spend at least 6 months to one year living as poor as you can， owning as little as you possibly can， eating beans and rice in a tiny room or tent， to experience what your “worst” lifestyle might be. That way any time you have to risk something in the future you won’t be afraid of the worst case scenario.