Brennan: Booth. Booth!
Booth: [who has just come to after hitting his head] Bones, what are you doing on the ice?
Brennan: I get nervous when you fall down and don't get up.

Brennan: Cam says everybody thinks I'm a cold fish.
Booth: What you are is Iceland: cool to the touch, but underneath you're all volcano!
Brennan: I don't like people thinking that I'm a cold fish.
Booth: Look, if you were really a cold fish, you wouldn't care.
Brennan: You used logic on me! That's sweet! [They smile.] Cam says the reason I didn't hear the gunshot is because I'm cheating on you.
Booth: Jared thinks, you know, I'm the killer, and he's helping me get away with it.
Brennan: So you're a murderer; I'm unfaithful. We are a very exciting couple!

Brennan: Do you consider yourself to be one of my "brighter grad students," Mr. Nigel-Murray?
Vincent: Yes, and so do you, Dr. Brennan.
Booth: I am not calling this kid Mr. Nigel... anything.
Vincent: Vincent. Or Vince, or Vinny, Vin... Vincenzo. Actually, uh, I had this girlfriend, once, who used to call me "Vino Delectable" because of how my -- uh, you don't... need to know that.

Brennan: I didn't have sex with him, Cam.
Angela: Didn't have sex with who?
Cam: Jared Booth.
Angela: Good.
Brennan: Why good?
Cam: Because... because...
Angela: Because he's Booth's little brother, and it would just be a creepy way to have sex with a Booth without having sex with the real Booth.
Cam: Kudos, Angela. I would not have had the guts to say that out loud.

Brennan: I know intellectually jealousy is absurd, but I see that it's real for people... I even experience it myself.
Booth: So what are you jealous of?
Brennan: Angela. Hodgins. Cam. You.
Booth: Why?
Brennan: Because you all want to lose yourself in another person. You believe that love is transcendent and eternal... I want to believe that, too.
Booth: Hey, you will... I promise. Someday you will.

Brennan: I myself have no one in my life whom I talk to that much. Outside of work, I mean. Perhaps that is good.
Ken Nakamura: How so?
Brennan: I can see how much pain you're in. Is it worth it? To have your own happiness so contingent on another human being?
Ken Nakamura: If I was willing to give up my life for Sachi, why would I not be willing to risk my happiness for her?

Brennan: I'm not discriminating because he's a Muslim. I find all religions equally irrational!

Brennan: No lions?
Hodgins: Not in the whole park.
Booth: There are tigers. How much difference can there be between lion urine and tiger urine?
Brennan: There are no stripes in lion urine.

Brennan: Okay, well I think what we need to do is get a syncopated rhythm going, that takes advantage of the natural frequency of the springs...
Booth: Whoa, whoa, whoa, wait a minute, are you this spontaneous during real sex?
Brennan: Yes, I am.

Brennan: Pregnancy is unlikely without intercourse.
Booth: Yeah, 'thanks for the tip, Bones.

Brennan: So did the police try to convince you I was having an affair with Arastoo?
Booth: It's what they do, you know? They drive wedges.
Brennan: It wouldn't be irrational to think I was having an affair with him. He is very handsome.
Booth: Yeah, I'd feel it if the energy was bad between the two of us. I'd know. The same way that you would know that I couldn't murder someone.
Brennan: I believe you would murder someone for me, and I believe you'd lie about it so I wouldn't have to carry the burden.

Brennan: They keep track of sexual conquests by putting stars on the wall?
Sweets: It's emotionally stunted.
Booth: Guys, it's a college fraternity.
Brennan: They seem like really terrible people.
Booth: They're college kids, okay? It's their job description to be bad. It's what they do.
Sweets: Yeah, but still. It's a community of young men mutually supporting bad decisions.
Booth: Look, these kids, they go out into the world. They're alone, they have no supervision, they have to be bad. It's just in order to figure out what it is. It's a scientific fact that their frontal lobes are the size of raisins.
Brennan: No, that is not a scientific fact.
Booth: What they've got to do is build their frontal lobes with exercise, and that comes from doing the wrong thing.
Sweets: Okay, so you're theory is that they've got to be bad to be good.
Booth: Exactly. It's the facts of life, my friend. Okay, so whats transmissions did you get from the brothers?
Brennan: Booth, he is not a radio.
Booth: Well, he kind of is. That's why I brought him along, Bones.
Sweets: What I did observe, using my eyes and my training, is that these two frat brothers weren't actually upset about Beaver's death.
Brennan: How do you know?
Sweets: Well, real grief comes and goes in waves. These guys had their face set in sadness the whole time. They were lying.
Brennan: I believe you're just guessing.
Sweets: Okay, fine. I'm just a magic eight ball. [walks away]
Booth: I think you hurt his feelings.
Brennan: [incredulous] Did you believe him?

Brennan: We're scientists. We can't quantify or rely on our emotions. They're arbitrary and indeterminate.
Saroyan: We know people through our feelings, Dr. Brennan. You trust Booth because of how you feel.
Brennan: No, I trust Booth because of past actions.
Saroyan: And faith in the future. I'm sorry, but feelings are important. Even to you.
[Angela walks in with her sport outfit]

Brennan: Welton cheated on you?
Cam: That's why I left
Brennan: Does that bother you?
Angela: Sweetie, how many times do I have to tell you that, most people don't like to be cheated on?
Cam: The only people who don't mind are just given up..
Angela:..Or are very very rational [looking at Brennan, Cam realized Angela's reference about Brennan] and are above those archaic notions of monogamy [Brennan nods a little]
Cam: Right, yes, of course, I'm not..quite..evolved..enough.

Brennan: What are you going to do?
Booth: Something personal.
Brennan: What is it?
Booth: Personal. Personal means personal. You know, not for the public.
Brennan: I'm not the public!