You mean this?

"you can't kill me, 'cos I'm already inside you..." ~ SlipKnoT

this is Spike and Hatred. Hatred is a shapeshifter and demon, who talks to Spike occasionally. Spike sees him as a real creature, when really Hatred is just an emotion. Spike's brain's way of protecting Spike, in a complicated way... He's an emotion Spike is afraid of admitting he has.

Hatred is a personality inside of Spike, which is actually a defense mechanism; an extreme way of bottling up bad memories after long term abuse.
Hatred started out as an undefined shape, in the mind of Spike when he was a child, and was a kinder, but rude personality. Spike talked back to Hatred because, well, he had no one else in the world to talk to at the time.
Hatred soon told Spike things he should do to harm or even kill Charles (his abusive uncle, to those who don't know). But Spike was too afraid of Charles to do anything back. Besides, he was a brainwashed kid, who believed Charles loved him and that he deserved the abuse.
Hatred got sick of Spike never listening to him, eventually, and tried taking over his mind permanently. He would talk down to Spike, in a way that Spike would believe in it. The plan was that if he could get Spike to trust him, he could easily take over his mind. However, Spike started hating Hatred, because he'd completely stopped being nice to Spike, he was just a rude, evil and unpleasant creature. And Spike wanted to get rid of him.
This was, in a way, Hatred's plan all along; the more hate Spike had, and felt, the more alike they would be, and when Spike eventually became full of hate, they would end up being the one and same person...

So, this is just a drawing to have fun with that idea, of Hatred and Spike becoming one. And I like the idea that Hatred can do whatever he wants to Spike, but Spike can't even touch Hatred -- because he only exists in Spike's mind, but Spike doesn't even realize that.

So I think that quote there fits... :3 "you can't kill me 'cause I'm already inside you"


..and Hatred can't really kill Spike since he's just a figment of Spike's imagination..

"Верность"

[PS: Не знаю, сколько я еще осилю так на вахте для рисования по полтора часа сна отбирать]