Brennen:You know he difference between strength and imperviousness,right?
Booth:No, not if you get scientific on me.
Br:Well, err, a substance that is impervious to damage does not need to be strong. When you and I met, I was an impervious substance, now I am a strong substance.
Bo:I think I get what you mean.
Br:A time can come when you are not angry anymore and I am strong enough to resist losing my last imperviousness, maybe we can then try to be together.