Booth and Brennan in “The Blackout in the Blizzard”

Booth

I'm just angry. I'm really angry. [sees Brennan looking at him warily] Not at you.

Brennan

[sighs] Okay.

Booth

I just need time, that's all. I just need time to kind of hang back and find that inner peace before I, you know, get back out there. You know what we're talking about here, right?

Brennan

Yes.

Booth

You and me, you know, and love, happiness, and life and fate.

Brennan

I don't believe in fate, but I know what we're talking about. I am improving.

Booth

Improving?

Brennan

Yes, I'm quite strong.

Booth

Yeah, well you've always been strong.

Brennan

You know the difference between strength and imperviousness, right?

Booth

[smiles] Not if you're going to get all scientific on me.

Brennan

[chuckles] Well, a substance that is impervious to damage doesn't need to be strong. When you and I met I was an impervious substance. Now I am a strong substance.

Booth

I think I know what you mean.

Brennan

A time could come when you aren't angry anymore and I'm strong enough to risk losing the last of my imperviousness, maybe then we could try to be together.