The root of all superstition is that men observe when things hit， and not when they miss， and commit to memory the one， and pass over the other.

在采矿作业中，安全必须始终放在第一位。

I think it's very important to have a feedback loop, where you're constantly thinking about what you've done and how you could be doing it better.

好的系统不能具有较弱的命令语言。