Mary: Should you really be reading in the car, baby?
Sheldon: I'll be fine.
Mary: You sure? You're not the one who'll have to clean up the oatmeal back there.
Sheldon: I said I'll be fine. And it's the blueberries you should be worried about.
Mary: Well, you're in a mood.
Sheldon: Maybe because there was so much bickering going on at home that I couldn't study.
Mary: Oh, I'm sorry if our family problems are getting in the way of your schoolwork.
Sheldon: I accept your apology. [vomits]
Mary: Oh...
Sheldon: Yep, blueberries.

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: Let's say grace.
Sheldon: Hang on, safety first. [puts mittens on]
George Jr.: When are you gonna get over that?
Sheldon: I would think recent events would make you value protection.
Mary: Enough.

Sheldon: If we're switching religions, may I recommend Judaism.
Mary: Why?
Sheldon: Both William Shatner and Leonard Nimoy are Jewish.
George Sr.: So?
Sheldon: Isn't that enough?

Adult Sheldon: I was struggling to focus and needed help. Luckily, there was someone on campus I could always count on to lend a friendly ear. A second mom, if you will.
President Hagemeyer: What now?
Sheldon: You said if I ever had a problem, I could come to you and you'd fix it.
President Hagemeyer: When did I say that?
Sheldon: September 13th, 1991. You had just eaten a poppyseed bagel and had one stuck in your teeth.
President Hagemeyer: I'll take your word for it.
Sheldon: It was right here. How did it not make you crazy? It made me crazy.
President Hagemeyer: What do you want?
Sheldon: My family's falling apart.
President Hagemeyer: Oh, I'm sorry to hear that. Uh... what do you want me to do?
Sheldon: Fix it.