Dr. Lee: I was carrying pulsers 75 feet up a wet metal ladder when there was an earthquake. [chuckles] So, I am hanging on for dear life...
Sheldon: Ooh, we should set up several radio telescopes on different rooftops in an array.
Dr. Lee: [Mandarin: "Does this kid have an off switch?"]
Dr. John Sturgis: You speak Mandarin.
Dr. Linkletter: [Mandarin: "I do. I take it you do as well?"]
Dr. John Sturgis: [Mandarin: "Yes. And Sheldon doesn't have an off switch..."]
Sheldon: I heard my name. What are they saying?
Dr. Linkletter: I don't speak Mandarin. Just a little French.
Dr. Lee: Oh, really? [French: "I asked if Sheldon has an off switch."]
Dr. Linkletter: Ha! [French: "I wish he did!"] [laughter]
Sheldon: Well, does anyone here speak Klingon? [Klingon: "Where do you keep the chocolate?"]

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.

Missy: So, this Dr. Lee is turning your friends against you?
Sheldon: Essentially.
Missy: Classic move. Most girls you find crying in the school bathroom, that was it.
Sheldon: What do I do?
Missy: Well, you're in a tough spot 'cause your personality is ugh.
Sheldon: There's enough people being mean to me right now.
Missy: Sorry.
Sheldon: Can you help me or not?
Missy: It's you against a bunch of college professors. I don't think you can win this one. [Sheldon starts to walk away] Oh. Do any of them have pimples?
Sheldon: No.
Missy: Too bad, I've done a lot of damage with "pizza face."

Dr. Linkletter: I cannot work with that creepy little know-it-all one more day.
President Hagemeyer: I-I'm sorry, but are we talking about Sheldon or Sturgis?
Dr. Linkletter: Sturgis. Well, both, but mostly Sturgis.
[cut to:]
Dr. John Sturgis: He's not interested in anyone else's input.
President Hagemeyer: I-I'm sorry, Sheldon or Linkletter?
Dr. John Sturgis: Linkletter.
President Hagemeyer: Ah, got it. Continue.

Dr. John Sturgis: I was brought in to help but Dr. Linkletter doesn't value my input.
President Hagemeyer: Oh, I hear you. That must be tough.
[cut to:]
Dr. Linkletter: Ever since he was brought back, he contradicts everything I say.
President Hagemeyer: I hear you. That must be tough.
[cut to:]
Sheldon: There was a time when their arguing brought out the best in them, but now it's just hindering our work.
President Hagemeyer: I hear you. That must be tough.