Sheldon: You know, I got her an iPhone for Christmas. I'll see where she is.
Leonard: Oh, that's nice. Most people her age don't embrace technology.
Sheldon: Oh, no, she doesn't even know she has it. No, I had my sister slip it in her bag so that I can track her like a sea turtle.
Leonard: Same as when we lost you at the zoo.
Sheldon: Uh, for the hundredth time, I smelled kettle corn and couldn't find the cart.
Leonard: Still doesn't explain how you ended up on the freeway divider.

Leonard: Penny, as a scientist, my job is to figure out why things happen. But I don't think I'll ever understand how someone like me could get to be with someone like you. You know maybe I don't need to understand it, I just need to be grateful. I love you, Penny.

Leonard: What would you be if you were attached to another object by an inclined plane, wrapped helically around an axis?
Sheldon: Screwed?
Leonard: There you go.

Leonard: My point is, while you're spending all this time on your own, building computers or practicing your cello, what you're really doing is becoming interesting. When people finally do notice you, they're gonna find someone a lot cooler than they thought. And for those of you that were popular in high school, it's over, sorry. Thank you. Congratulations.

Amy: You have an engagement ring?
Sheldon: Yes.
Amy: Penny, did you know about this?
Penny: All right, let's go.

Meemaw: Thank you, Moon Pie.
Amy: Uh, I'm curious. Why do you call Sheldon "Moon Pie?"
Meemaw: 'Cause he's so nummy-nummy.
Leonard and Penny: She could just eat him up.

Amy: That's great. And look at you, sitting in Sheldon's spot. You know, I don't even get to sit there.
Sheldon: Yeah. And you never will.