Missy: Why don't you believe in God? [Sheldon raises his hand] Sheldon.
Sheldon: Because science explains the universe without the need of inventing a supernatural being.
Missy: But how do you know for sure He doesn't exist?
Sheldon: Ooh. [raises hand]
Missy: Stop that.
Sheldon: The burden of proof isn't on me. If I said there was an invisible monkey in the room with us, you shouldn't believe me just because you can't prove me wrong.

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]

Mary: Let's say grace.
Sheldon: Hang on, safety first. [puts mittens on]
George Jr.: When are you gonna get over that?
Sheldon: I would think recent events would make you value protection.
Mary: Enough.

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.

Pastor Jeff: Now, for a psalm 100 bookmark, who can name the apostles? [Billy raises his hand] Billy.
Billy Sparks: Sleepy, Grumpy, Doc...
Pastor Jeff: Those are dwarves. Anyone else?

George Sr.: Just go get your money back and buy a different car.
George Jr.: No.
George Sr.: Georgie, I'm not playing around.
George Jr.: Neither am I. I bought it with my own money, and you don't get a say.
George Sr.: As long as you live under my roof, I get plenty of say.
George Jr.: Fine. I'll move out.
George Sr.: And where you gonna go?
George Jr.: I'll live in the van.
George Sr.: [laughs] You know what? It was only a matter of time before you lived in a van. Have at it.
George Jr.: Scooby-Doo lived in a van, and he turned out fine.

Sheldon: Why would Paige get competitive over Bible trivia? She doesn't care about that.
Mary: Maybe she just wanted that bookmark.
Missy: Yeah. I wanted this "what would Jesus do?" slap bracelet. Ow.
Sheldon: I liked it better when she and I were making fun of everything.
Mary: You might have more fun if you participated, too.
Sheldon: Oh, I'll participate.
Mary: Great.
Sheldon: If Paige wants to go head-to-head on Bible trivia, she picked the wrong fact-filled atheist to mess with.
Mary: [quietly] Great.