Sheldon: I'm glad we're no longer in trouble for almost burning the school down.
Meemaw: Ooh. Let's talk about that.

Sheldon: Missy and I broke a lot of rules the other night, and we've received no punishment.
George: [sighs] Buddy, it's been a rough week. We're just glad you're both safe.
Sheldon: But in the absence of a divine being, society's rules are what keeps a person's morality in check.
George: Well, there you go.
Sheldon: No, y-you're not following me. If actions have no repercussions, society breaks down, everything devolves into chaos.
George: You might be overthinking this.
Sheldon: I thought so, too. Then I thought about it, and I'm not.
George: Sheldon, you had one bad night. Just let it go.
Sheldon: But... I did something wrong and I got away with it. That's not okay.
George: Buddy...
Sheldon: Socrates maintained that the man who lies to himself has an enemy living within. He's not even a person. He's just a chaos of selfish desires wrapped in an animal hide.

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.

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]

Georgie: Should I be wearing all that?
Sheldon: I recommend it. Those rocks are filthy.
Georgie: I'm good. God made dirt. Dirt don't hurt.

Georgie: Tell me, Sheldon.
Sheldon: It occurred to me that a good way to generate a positive cash flow would be to curate popular songs and make them available in a digital form. Possibly on a small device that could also be used as a phone or even a camera.
Georgie: Right. [mocking] A phone, camera, music machine. Get out of here.

Mary: To be honest, I'm a little concerned that I have given you the wrong impression about how prayer works.
Missy: I get it. I ask God for stuff, he gives it to me. It's not rocket science.
Mary: Missy, God does not grant wishes.
Missy: So he gave me good luck?
Mary: [sighs] It's not luck. Luck is chance, and God has a plan.
Missy: Right, and his plan is to give me what I want when I pray. That's why he's so cool.
Mary: No. I- I mean, he is cool, but sometimes that might not be his plan.
Missy: Then what's the point of praying if he's just gonna do what he wants?
Mary: You don't pray to God to get things. You pray to build a relationship with him.