Sheldon: I never thought a sphere suspended in mineral oil could be so exciting.
Dr. Linkletter: Eight minutes and it hasn't moved. So far so good.
Sheldon: Oh, boy, my heart is pounding. I hope I don't turn into an adrenaline junkie.

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.

Dr. Linkletter: Perhaps we could create some sort of a cocoon to suspend it.
Sheldon: Out of wire?
Dr. Linkletter: Or nylon. But I wouldn't know how to weave it around a sphere.
Meemaw: I'm not a genius, but it sounds to me like what y'all are talking about is, uh, crochet.
Dr. Linkletter: I suppose we are.
Meemaw: Because with crochet, you can make all kinds of shapes.
Dr. Linkletter: Intriguing.
Meemaw: Hell, I even crocheted a cover for Jolene.
Dr. Linkletter: I'm sorry?
Meemaw: That's my bowling ball.
Sheldon: She likes to name inanimate objects... it's odd.
Dr. Linkletter: Or whimsically charming.

Pastor Jeff: Get this. I drove past the Methodist church and you know what the sign out front said?
Mary: What?
Pastor Jeff: "Friendship, pirate ship, try the best ship... worship."
Mary: Clever.
Pastor Jeff: That was our sign last year! I wrote that!
Mary: Isn't the most important thing that it might get more people to go to church?
Pastor Jeff: But whoever did it has the sin of stealing on their soul now, so at least there's that.
Mary: There you go.

Dr. Linkletter: So, the problem that I'm running into is I can't get the inner sphere to remain suspended in the buffer liquid.
Sheldon: Have you tried wrapping the sphere in copper wire?
Dr. Linkletter: I did, but it just slips out.
Sheldon: Perhaps we could suspend it in some sort of sleeve.
Dr. Linkletter: That would prevent light from getting through.
Sheldon: Hmm. [strokes chin] I wonder if my thinking would be more effective if I had a beard to stroke. It's one of the few aspects of puberty I'm looking forward to.