"Well, thank you, but don't worry about that, okay? Because right now, it seems like water over the dam or under the bridge or wherever the hell it is water goes when you stop thinking about it.

"Since, you know, we're kind of in the middle of some kind of flood that seems like could pretty easily wipe out the brigde and the dam, you know?"

She pauses.

"Yeah, I took that metaphor too far.

"It would just be a lot worse if you weren't here."

She knows, because she has seen what it looks like, what Brennan looks like, when Agent Booth isn't there.