"I've done it for other people," Angel reasons aloud, as though the question itself were as benign as asking for something like a sandwich or a cup of coffee. "People who trust me to do what needs to be done if the time comes, just like I trust them. If you want someone to help you make sure you don't go off the rails-- then I'll do what I can."

It's dangerous to make promises in situations like these, but having someone who understands is more important than almost anything else. It's why the bond between him and Faith has remained strong despite all their ups and downs, why they'll always come back to one another when they need help. They get it in a way no one else can.

"I'd be willing, if that's what you want for yourself."

Because you can only help someone who wants to be helped, something he'd learned the hard way over and over again.