Adult Sheldon: And I, despite being innocent of all wrongdoing, was being punished as well. Not by my parents, but by society and their insistence on a "spring break."
Sheldon: One whole week of no school. No fair.
Mary: You two should do something together. Go outside, take a walk.
Sheldon: I'd rather die.
Missy: I'd rather read.

Mary: Too bad. We are going.
Sheldon: Class is starting tomorrow. I'm not going anywhere.
Mary: Sheldon, do not argue with me. You are going home.
Sheldon: Mom, the people of Germany are obsessed with rules and devoid of humor. I am home.

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: You understand that some people are going to be intimidated by you, because of how smart you are?
Sheldon: Or maybe they'll recognize my intellect and make me their leader.

Sheldon: While Dad's gone, I'm the man of the house, and the man of the house has to enforce the rules.
Missy: The man of the house is about to get his teeth knocked out.
Sheldon: Puberty's made you mean.
Missy: I need to know what happened on my show.
Sheldon: And you'll find out when your privileges are restored.
Missy: I can't wait that long, each episode builds on the last. Imagine a Star Trek that ends with "to be continued," and you don't get to continue.
Sheldon: That would never happen, because I follow the rules.
Missy: You are this close to a purple nurple.
Sheldon: [covers nipples] You leave my nurples alone.

Georgie: [sings] ♪ The stars at night ♪ ♪ Are big and bright ♪ [claps four times] ♪ Deep in the heart of Texas ♪ ♪ The prairie sky ♪ ♪ Is wide and high ♪ [Georgie and Meemaw clap four times] ♪ Deep in the heart of Texas. ♪ Remember, it's always four claps. Never three, always four.
Meemaw: You know who claps three times? Yankees.
Georgie: And as Texans, we always remember the Alamo.
Meemaw: Otherwise, we might as well just live in Oklahoma. Blech.

Sheldon: I know a way for you to watch whatever you want.
Missy: How?
Sheldon: Your imagination.
Missy: That's stupid.
Sheldon: Did you know there's a German folk song about it?
Missy: Don't.
Sheldon: [sings] ♪ My thoughts will not cater ♪ ♪ To duke or dictator ♪ ♪ No man can deny ♪ ♪ Die gedanken sind frei. ♪ [talks] Where are you going?
Missy: Mom said no music.
Sheldon: [hums melody]