Sheldon: How are you feeling?
Amy: Ugh. My stomach aches, I got the chills, my mouth tastes weird, it hurts to swallow, and I've got a little double vision.
Sheldon: Yeah. I'm feeling better, too.

Sheldon: You know, surprisingly, the letter from your father wasn't the most interesting thing I read in the closet. Bernadette's diary has some saucy passages.
Bernadette: Sheldon, don't you dare.
Sheldon: There's nothing to worry about. Your secret's safe with me.
Bernadette: That's more like it.
Sheldon: Although copyright law would allow me to quote snippets in the context of a review.

Sheldon: Howard, I've had my eye on this limited edition Swamp Thing, but now that I'm about to buy it, I'm having second thoughts. What do you think?
Howard: I don't know, Sheldon, it's pretty expensive.
Sheldon: Yes, but what if it will make me happy, you know, waking up and seeing it every morning for the rest of my life?
Howard: Really, a walking clump of swamp grass?
Sheldon: Yeah, well, Bernadette's no prize either!

Amy: The last time we were in this room, we were getting married.
Sheldon: I remember. It's a lot less impressive without Mark Hamill in it.
Amy: That's what you said about our honeymoon.
Sheldon: And I stand by it.

Sheldon: Now to business. Eighteen years ago, I sent the FBI Crime Lab samples from a bag of excrement that had been lit on fire on my front porch for fingerprinting and DNA analysis. Why haven't I heard back yet?
Agent Page: Well, the FBI Crime Lab does have a lot on its plate.
Sheldon: That's of little comfort to a nation attempting to scrape burning faeces off its shoes.

Employment adviser: So, Mr. Cooper, you're looking for a job?
Sheldon: A menial job. Like yours.
Employment adviser: Why thank you for noticing. I'm Menial Employee of the Month.

Sheldon: As much as I'd love to meet Euclid, inventor of the geometric proof, he probably wore sandals and I can not look at toes during dinner.

Sheldon: I will play the word "at" for two measly points, throwing the game and thus securing my friendship with the smartest man in the world.
Howard: What are you waiting for? Hit send.
Sheldon: I can't. Losing on purpose is intellectually dishonest.
Raj: So don't do it.
Sheldon: Oh, but I want to be Hawking's friend.
Howard: So do it.
Sheldon: Oh, but if I do, I'll be a phony, a sellout, a Hollywood poser.
Raj: Then don't do it.
Sheldon: I won't. This feels right. My mother always said, to thine own self be true.
Howard: Good for you.
Sheldon: 'course she also told me that every animal in the world got on one boat, so what does she know? And send.

Sheldon: This is how you're going to entertain your little cousin and his friends? By lying to them?
Howard: How is this lying?
Sheldon: A magic show is an inherently deceitful proposition. This is an ordinary top hat. You've chosen that card freely. I do not have a set of lock picks lodged in my keister.
Raj: Can't you just enjoy the wonder, Sheldon? Why must you peek behind the curtain? Or up the butt?
Sheldon: If we poison the critical thinking faculties of children by telling them that rabbits come out of hats, then we create adults who believe in astrology and homeopathy and that Ryan Reynolds was a better choice for Green Lantern than lovable rogue Nathan Fillion.

Amy: Okay, what's the next test?
Sheldon: Loyalty. We need to choose someone who has our backs, someone who will keep our secrets even from each other.
Amy: Well, I don't have any secrets from you. Do you have secrets from me?
Sheldon: Yes. Oh, that has been weighing on me for years.

Sheldon: They can't just cancel a show like Alpha, you know. They have to help the viewers let go. Firefly did a movie to wrap things up. Buffy the Vampire Slayer continued on as a comic book. Heroes gradually lowered the quality season by season 'til we were grateful it ended.

Sheldon: I'm gonna need some help. Someone baby-proofed the front door.

Sheldon: We might as well stop. It's a stalemate. You're beating me at tetris, but you've got the upper body strength of a Keebler Elf.

Sheldon: Okay, I'll use real people. Um, if a certain dog-like loyalty is useful, then it's Leonard, hmm? If, uh, having a PEZ dispenser filled with TUMS is an advantage, Wolowitz, yeah. If a best man with fake testicles hanging from his truck is important, well, then, my brother's back in the running.

Leonard: All right, you brought this on yourself. Sheldon, get him.
Sheldon: If a zombie bites you, you turn into a zombie. However, if a mummy bites you, all you turn into is some schmo with a mummy bite. So, like a zombie that's been eaten from the waist down, you, sir, have no leg to stand on.