Mary: You want to get comfy on the couch and watch your Star Trek tapes?
Sheldon: No, thank you.
Mary: I know what'll make you feel better. [singing] Soft kitty, warm kitty Little ball of fur Happy kitty Sleepy kitty Purr, purr, purr Soft liar, warm liar Little ball of fib Happy liar, sleepy liar Fib, fib, fib. Feel better?
Sheldon: Uh-uh.

Sheldon: Missy and I broke a lot of rules the other night, and we've received no punishment.
George: [sighs] Buddy, it's been a rough week. We're just glad you're both safe.
Sheldon: But in the absence of a divine being, society's rules are what keeps a person's morality in check.
George: Well, there you go.
Sheldon: No, y-you're not following me. If actions have no repercussions, society breaks down, everything devolves into chaos.
George: You might be overthinking this.
Sheldon: I thought so, too. Then I thought about it, and I'm not.
George: Sheldon, you had one bad night. Just let it go.
Sheldon: But... I did something wrong and I got away with it. That's not okay.
George: Buddy...
Sheldon: Socrates maintained that the man who lies to himself has an enemy living within. He's not even a person. He's just a chaos of selfish desires wrapped in an animal hide.

Ms. MacElroy: Now, can anyone tell me why Melville shifts the narrative voice from Ishmael to Ahab? [Ms. MacElroy waits for somebody else to raise their hand] Sheldon.
Sheldon: I have a tummyache. I'd like to see the nurse.
Derek: A "tummyache"?
Sheldon: Yes, Derek, I have a tummy and it aches. Ergo, tummyache.
Derek: Ergo?
Sheldon: It's Latin, Derek.
Ms. MacElroy: Go to the nurse.
Sheldon: And to answer your question, the shifting point of view grants the reader a broader perspective of events than typically allowed by first-person narration.
Ms. MacElroy: Where were we?
Sheldon: And "ergo" is Latin for "hence," Derek.

Principal Petersen: Our next young speaker needs no introduction, but that didn't stop him from writing one and making me read it. [laughter] "Fun fact." [audience groans, murmurs] I hear you. "The word 'valedictorian' is from the Latin 'valedicere,' meaning 'to say farewell.' It is primarily used in the United States, Canada, the Philippines and Armenia." Maybe that fact's more fun in Armenia. Please welcome your valedictorian, Sheldon Cooper.
Mary: Yay, Shelly!
Sheldon: Hello. I'm not very comfortable speaking in front of crowds. But there's a technique to reduce stage fright by focusing on one person in the audience and delivering your speech just to them. That's what I'll be doing today. If it weren't for this person, I wouldn't be here right now. They've taught me a lot, and it's by their example that I found the courage to move forward into this new and exciting chapter of my life. Missy... ...this is for you. Change can be scary, but I know we're going to be fine... ...because like you said, "It's okay to be scared. We just have to do it anyway." So if any of my fellow graduates are nervous about the future, know that you're not alone. I suggest you all try to be as brave as my twin sister. That's my plan. Missy, I wish I could give you advice about middle school, but I was so smart, I skipped it. If you make it to high school, we'll talk. Thank you. [applause]

Adult Sheldon: The following day, I returned to school. I had no choice but to fulfill my swimming requirement. Much like Batman, I suited up and faced my fears. Unlike Batman, I did it with a doggy-paddle across the shallow end of the pool. Uh, regarding pool sanitation, it turned out I was right. It was teeming with germs. Only I was the one who put them there. As it happens, my interaction with Billy Sparks did get me sick. I, in turn, created a small epidemic taking down 128 students, four teachers and one principal. It didn't stop there. I also infected my mother, father, sister, brother, Meemaw and Meemaw's friend Dale. The newly established boundaries of friendship helped keep Dr. Sturgis healthy. However, in an unrelated incident, he crashed his bike into some garbage cans. Luckily, he landed on his recently acquired athletic cup.
Dr. John Sturgis: That was a wise purchase.

Adult Sheldon: In many ways, a high school is like an academic house of horrors. There's the cafeteria, which when even freshly cleaned, maintains a subtle aroma of tater tots and throw-up. The schoolyard, where one is exposed to bullying by delinquents and attacks from above by eye-pecking demons. [bird tweets] But all of these pale in comparison to the most horrific location of all. A place teeming with the sweat and secretions from hundreds of unwashed bodies. The swimming pool.

Principal Petersen: Sorry, Sheldon. Water safety is a required part of your P.E. class.
Sheldon: But other kids use that pool. It's basically a big bowl of teenager soup.
Principal Petersen: It's out of my hands. It's a state requirement. If you don't like it, take it up with your congressman.
Sheldon: I did. He won't return my calls.
Principal Petersen: Then I guess you're swimming tomorrow. [manic laughter, thunder clap and lightning]
Adult Sheldon: Except for the laughter, the glowing eyes and the lightning, that's exactly how it happened.