Dr. Larry Fleinhardt: Change is inevitable, and those who adapt most quickly are the most likely to survive.

Dr. Larry Fleinhardt: Charles, the monks do not appreciate FBI agents knocking on their doors, especially during the morning contemplation.

Dr. Larry Fleinhardt: Charles, you look like someone just stole your chalk.

Dr. Larry Fleinhardt: Charlie, don't move, don't move. His head was like this. You make a terrible assistant.

Dr. Larry Fleinhardt: Children are wormholes. They're portals into the unreachable future and unattainable past. Well as .the things stand now, they exist only in theoretical realms.
Amita Ramanujan: Well.. I consider, you might have some trouble selling a woman the idea of carrying your wormhole.

Dr. Larry Fleinhardt: Curiosity. Not good for cats, great for scientists.

Dr. Larry Fleinhardt: Evaluating my immediate prospects for a conventional nuclear family, I've just now begun to consider adoption.
Charlie Eppes: How long have you been considering that?
Dr. Larry Fleinhardt: Three days.
Charlie Eppes: Give it a few more days.

Dr. Larry Fleinhardt: Her parents were both schooled here. They raised her here. I'm sure they're very intelligent, cosmopolitan people.
Charlie Eppes: They tried to arrange a marriage for her.
Dr. Larry Fleinhardt: Yeah, that had slipped my mind.

Dr. Larry Fleinhardt: Here's a discussion: Why is it we remember the past and not the future?
Charlie Eppes: That's a tough one, Larry.

Dr. Larry Fleinhardt: I believe that's my copy of the Quarterly Review of Cosmology?
Charlie Eppes: Yeah, it is ...
Dr. Larry Fleinhardt: Why are we engaged in combat over it?

Dr. Larry Fleinhardt: I have to confess, this whole business of rearranging DNA to suit human needs, I find very exciting; in this rather ... life-threatening, world-ending sort of way.
Season Five

Dr. Larry Fleinhardt: I haven't heard of any of these artists, and it's not like I've been living in a cave.
Charlie Eppes: No, just a space station and a monastery ... and � oh yeah! � the steam tunnels.
Dr. Larry Fleinhardt: Point taken.

Dr. Larry Fleinhardt: I sense a big hairy "but" coming. Ooh, pardon my terrible pun.

Dr. Larry Fleinhardt: I should shut up, shouldn't I?
Megan Reeves: No-o, you should kiss me now.

Dr. Larry Fleinhardt: I'm avoiding Laurel Wilson.
Amita Ramanujan: The professor of philosophy of science?
Charlie Eppes: She's the lady you go hiking with?
Dr. Larry Fleinhardt: For years we've enjoyed this ... I don't know ... delightful wilderness-based friendship, entirely platonic. But last night, she and I just veered ... we veered off into the carnal.
Amita Ramanujan: I'm taking it didn't go well.
Dr. Larry Fleinhardt: Actually, it was incredible. It was primal. I mean, in the animal, not the numerical, sense. But what I'm saying, this was a perfect event, and, as such, untwinnable.
Amita Ramanujan: So, because the sex was great, the odds are against it ever being great again.
Dr. Larry Fleinhardt: The replication defies the laws of probability.
Amita Ramanujan: [dryly] So, why try?
Dr. Larry Fleinhardt: [missing the sarcasm] Yes, yes. That's why I'm here. I mean, it's the perfect refuge.
Charlie Eppes: What do you mean, "the perfect refuge"?
Dr. Larry Fleinhardt: Well, the math department must be the least libidinous place on campus.