Bones, Season 6

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.