Sheldon: I'm trying to study, and your loud music is very distracting.
Oscar: You mean the game?
Sheldon: "The game"? I'm not up on today's one-named pop stars.
Oscar: No. It's a video game.
Sheldon: You have video games?
Oscar: A bunch. You play?
Sheldon: My meemaw and I beat Quest of Adeera.
Oscar: Dude, this kid beat Adeera.
Darren: Well, tell him to come in.

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: Sheldon, faith means believing in something you can't know for sure is real. And right now, I am struggling with that.
Sheldon: So you don't believe in God anymore?
Mary: That isn't something for you to worry about. I need to figure this out myself.
Sheldon: Can I help? Maybe I could provide a fresh perspective.
Mary: I don't think so, baby.
Sheldon: Did you know that if gravity were slightly more powerful, the universe would collapse into a ball?
Mary: I did not.
Sheldon: Also, if gravity were slightly less powerful, the universe would fly apart and there would be no stars or planets.
Mary: Where you going with this, Sheldon?
Sheldon: It's just that gravity is precisely as strong as it needs to be. And if the ratio of the electromagnetic force to the strong force wasn't one percent, life wouldn't exist. What are the odds that would happen all by itself?
Mary: Why are you trying to convince me to believe in God? You don't believe in God.
Sheldon: I don't, but the precision of the universe at least makes it logical to conclude there's a creator.
Mary: Baby, I appreciate what you're trying to do, but logic is here. And my problem is here.
Sheldon: Well, there are 5 billion people on this planet and you're the perfect mom for me. What are the odds of that?

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.

Mary: What is going on? Sheldon, are you okay?
Sheldon: My stomach hurts.
Darren: He's gonna throw up.
Mary: Did you give him beer? Did they give you beer?!
[Mary follows Sheldon, Darren and Oscar into the dorm room]
Sheldon: Just root beer.
Mary: It's gonna be okay, baby. [Sheldon throws up] Oh. Why is it so colorful?
Sheldon: Too many... [gags] Skittles. [retches]

George Sr.: Where's the coffee?
George Jr.: I finished it.
George Sr.: When you finish a pot, you're supposed to make more.
Mary: Oh, is that the rule?
George Sr.: It is for him. Why are you reading my paper?
George Jr.: Well, pardon me for keeping up on events of the day.
George Sr.: Tomorrow's headline: Father Strangles Son.
George Jr.: Good luck. My horoscope says "things are looking up."

Mary: You did not just tell our son that he could stay the night by himself.
George Sr.: The campus is safe, and he's not by himself, he's with friends.
Mary: Friends that we don't know. What if there is alcohol?
George Sr.: Then they're gonna get a lot of fun facts about the history of fermented beverages.
Mary: I am serious.
George Sr.: So am I. How else would I know that monkeys get drunk by eating rotten fruit off the jungle floor?
Mary: He is not ready for this kind of situation.
George Sr.: Mary, he's a good kid. He's not gonna drink anything he shouldn't. And if he cared about peer pressure, he wouldn't wear a bow tie.