Adult Sheldon: Dr. Sturgis was right. There was nothing I could do to fix this, or so I thought.
Sheldon: Can I offer you a hot beverage?
Paige: That would be nice.
Sheldon: Be right back.
Adult Sheldon: The "Hot Beverage of Comfort" would become my go-to method of dealing with someone in emotional distress. And it always worked. Except when my wife was in labor, where it was suggested I throw it in my own face.

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.

Paige: You're being weird, and not in the usual way. Guess that's my life now.
Sheldon: What do you mean?
Paige: Everyone is acting weird. My mom is going on dates and my dad is acting like a child. My sister's crying all the time. I just wish that everything could go back to the way it was. I don't think it will.
Adult Sheldon: It turned out I was really good at listening. The trick is to sit there, and when you want to leave, don't.
Paige: I have to live in two separate houses. And my grandma says the meanest things about my dad. I know that everyone is upset that I'm not doing well in school. It's just hard to care. Everything that used to seem important to me just doesn't anymore. So I guess, really, I just feel alone.
Sheldon: That sounds hard.
Paige: Yeah, it is.

Sheldon: I didn't see any bow ties, just a shirt with a bad word on it. What did you put in your pocket?
Paige: Nothing.
Sheldon: Are you guys stealing? Because if you are, I am prepared to literally blow the whistle on you.

Paige: Why are you taking a backpack to the mall?
Sheldon: This is my mall safety kit. Earplugs to drown out crowd noise, Wet-Naps to wipe down escalator handrails, a compass, a map of the mall, and a whistle, in case I get lost or approached by a woman holding a perfume bottle.
Missy: You want to stuff him in there, right?
Paige: No. [nods]