这是《鬼吹灯》系列的核心概念，意指在古墓中点燃蜡烛以判断是否有鬼魂存在。

The truth is at once simpler and more complicated.

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.I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.