Adult Sheldon: President Hagemeyer was counting on me to turn the tide of public opinion and ignite the outrage of my fellow students.
Sheldon: Excuse me, would you like to sign my petition? It's about the university reducing our science requirements.
Lyle: [chuckles] Less science? Sweet.
Sheldon: No, it's to stop the reduction and keep our science curriculum strong. [Lyle walks off] Are you hurrying off to tell your friends?
[later, a student signs Sheldon's petition and hands it back to him:]
Sheldon: "Ben Dover." Thanks, Ben.
[montage:]
Student #1: No.
Student #2: Nuh-uh.
Student #3: Nope.
[later:]
Sheldon: Excuse me, would you like to sign my petition about keeping our science requirements strong?
Patricia: Of course. If you'll sign mine to increase funding for the school jazz band.
Sheldon: Let's pretend we never met.

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]

Missy: What's it like to not believe in God?
Sheldon: It's great. Big fan.
Missy: Are you ever afraid you're wrong?
Sheldon: About religion? Never. About other things? Also never.

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.

Mary: [prays] Please watch over Missy and Sheldon and especially Georgie. And please don't let my failings as a mother get in the way of Your plans for their lives. Amen. [gasps] Hey, baby. What's wrong?
Sheldon: Is it that obvious?
Mary: Well, you are outside, where birds live.
Sheldon: True. I'll make it quick. I'm experiencing what the Germans call weltschmerz.
Mary: Uh-huh. And what do Americans call it?
Sheldon: The pain of the world.
Mary: Sounds more fun in German.
Sheldon: Most things do.

Mary: You are unbelievable. It is bad enough for you to do all this stuff, but then to drag Georgie down into your den of sin.
Meemaw: Oh, please, it's not a den of sin. Although that is a great name. Den of Sin. That would get some butts in seats. [Mary exclaims]

Pastor Jeff: Hey, Mary. Quick question. Why can I see you through my newsletter?
Mary: Oh, sorry, I had to remove one of the ads.
Pastor Jeff: Was there anything important on the other side?
Mary: Just Peg's recipe for her grape salad.
Pastor Jeff: With the mayonnaise and the pretzels. Barf.