Booth: You know what, you’re not going to be any good if you starve yourself to death.
Brennan: She was laughing at me, Booth. I — I can’t let her win.
Booth: She won’t.
Brennan: You hope. She may be immoral, but she is brilliant.
Booth: Well, you’re more brilliant.
Brennan: What if her dispassion makes her more logical? What if that gives her an advantage over me?
Booth: What a second. Now you’re upset ‘cause you’re not more like a psychopath?
Brennan: I just think…Maybe I’ve lost my advantage because of all the people I’m involved with now. All of the relationships; they complicate logical thought.
Booth: You don’t mean that.
Brennan: Can we please just work?
Booth: Sure.
5x21 'The Boy With the Answer'