I suppose some of it is also not dark at all, and is simply funny. Here's another excerpt:

"If you're informed that someone or other is speaking ill of you, don't defend yourself against the allegations, but respond by saying: "Well, he must be unaware of my other faults, otherwise these wouldn't have been the only ones he mentioned."

It's stated a bit differently, but this is effectively the exact tact taken by Eminem's competition-winning rap in 8 Mile. "These guys think I'm bad? They missed all this obvious stuff, let me lay out all my faults for you."