Bones, Season 12

Brennan:
Moving forward, there is only one thing you can do for Aldo.

Booth:
Look, if you're gonna tell me to forgive myself, please don't.

Brennan:
Forgiveness would be ineffective.

Booth:
Okay then, what? I mean, what works?

Brennan:
Revenge.

Booth:
That's not me. I mean, there are rules.

Brennan:
You will follow those rules. The act of bringing a murderer to justice is, anthropologically speaking, a form of revenge. You have suffered a loss. Making the killer suffer for that loss will help.

Booth:
Yeah, well, I hope so, Bones. Because right now I couldn't feel much worse.