Sheldon: I've tried a few different activities, but whatever I do just leads me back to science.
Ms. Hutchins: Well, let's think about it. What's the opposite of science?
Sheldon: Science is based in facts, and the opposite of facts is fiction.
Ms. Hutchins: How about fantasy?
Sheldon: Magic and dragons.
Ms. Hutchins: We have a whole section here.
Sheldon: Ooh, that sounds intellectually bankrupt. I'll give it a shot.

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.

Adult Sheldon: Having found no answers, I took it upon myself to rectify the inconsistent timeline in Lord of the Rings. J.R.R. Tolkien had a brilliant mind, but let's be honest. He was no S.L. Cooper.

Mary: Baby, you need to eat something.
Sheldon: But it looks like I can change the definitions of electric and magnetic fields and rotate the magnetic charge away mathematically to zero.
Mary: Maybe some fried okra would help.
Sheldon: Richard Feynman didn't develop quantum electrodynamics by filling up on fried okra.
Mary: Well, maybe that's because his mama didn't love him as much as I love you.
Adult Sheldon: Richard Feynman was Jewish. His mother didn't give him fried okra.

Meemaw: So, what's new?
Mary: I'm worried about Sheldon.
Meemaw: I said "new."