So what does gold mean? It’s been so long and I don’t want to re-read the whole thing

The only thing i know is it's "Golden Comandment(Gold)"

Isn’t it the fact that he can see what’s dangerous and safe for him. I remember that he sees certain colours around things when he shouldn’t ever go near it, it’s dangerous to go near, or it’s safe. And recently he gained the power to see the gold around people that shows the golden commandment.