Sheldon: Please rise for the Pledge of Allegiance. I pledge allegiance to the Flag Of the United States of America And to the Republic for which it stands One Nation Here's a fun fact about the next two words: "Under God" wasn't added to the Pledge of Allegiance until 1954. My first act as your president is to remove the words "under God" from the Pledge in order to honor the separation of church and state in this public high school.
Principal Petersen: Okay, that's enough.
Sheldon: You can't take my microphone. I'm the president.

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.

Sheldon: Mr. Givens, I just wanted you to know that I'm still working hard on my campaign to get more funding for the science department.
Mr. Givens: Oh, great, 'cause I've got to dig up tomorrow's worms myself.

Adult Sheldon: Not all science is created equal. There's physics, the undisputed king of science.
There's chemistry. It's no physics, but it's not a bad way to pass a rainy afternoon. And then there's biology, the squishiest of the sciences.

Principal Petersen: [screams]
Sheldon: [screams]
Principal Petersen: What are you doing, standing there?
Sheldon: I wrote a formal complaint letter to the school board on how much money is spent on football. I was hoping you could deliver it to them.
Principal Petersen: You do realize your father's a coach here.
Sheldon: Yes, sir, I do.
Principal Petersen: Maybe you ought to talk to him about this first.
Sheldon: I did. He didn't care for the idea at all.
Principal Petersen: Well, there you go.
Sheldon: There I go what?
Principal Petersen: Let me see that. "Barbaric sport encourages bloodlust similar to Roman gladiator games Christians, lions money better spent on science and learning." You're joking, right?
Sheldon: Did you see the word "bazinga" anywhere in that letter?
Principal Petersen: Out.