Sheldon: Although I do think Missy should stay in school.
Missy: You think everyone should stay in school.
Sheldon: Well, I understand why someone like Georgie would rather work, but if you drop out, I think you would regret it.
Missy: Why?
Sheldon: Historically, women in the workplace have been undervalued. You don't want to make it easier for people to do that to you.
Mary: He's right.

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.

Sheldon: But why are you wasting your time here when you could be doing science?
Dr. John Sturgis: I told you, I'm happy here.
Sheldon: How could you be happy? You have a doctorate in physics, and you're sticking labels to a case of beans.
Dr. John Sturgis: I had to work here a month before they let me use this thing. And yet, I could go buy a real gun on my lunch break. Ha! Texas, huh?
Sheldon: But don't you miss trying to unlock the secrets of the universe?
Dr. John Sturgis: Sheldon, I spent my life chasing theoreticals. Here, I have tangible accomplishments and I get to listen to relaxing Top 40 music. Do you know this band, Air Supply? They're terrific. [sings] ♫ I'm all out of love ♫ ♫ I'm so lost without you ♫ ♫ I know you were right ♫ ♫ Believing... ♫

George Jr.: [o.s.] Did you like school?
Dale: Hated it. I quit and I joined the Army.
George Jr.: [o.s.] How was that?
Dale: Less girls, more getting shot at.
George Jr.: [enters] Well, at least you made it out alive.
Dale: Well, then I got married. Made me kind of miss getting shot at.
George Jr.: Have you ever been happy?
Dale: Ooh, let's see. No.

Dr. Linkletter: Well, I'm here to convince you to come back to the university. A mind like yours needs to be working on the advancement of science.
Dr. John Sturgis: Well, I did that for 50 years. Now I'm content just keeping these cucumbers crunchy.
Dr. Linkletter: But exciting new things are happening in string theory. Don't you want to be a part of that?
Dr. John Sturgis: Wasting years scrambling away at the academic hamster wheel? Constantly worried that your life's work is just one big dead end?
Dr. Linkletter: Sure, some paths of research may not pan out, but we still have to try, right?
Dr. John Sturgis: Do we?
Dr. Linkletter: Of course.
Dr. John Sturgis: I don't know. Einstein spent the last 30 years of his life on the grand unified field theory and got nowhere.
Dr. Linkletter: Well, I wouldn't say nowhere, but I suppose he never did crack it.
Dr. John Sturgis: And to this day, no one has.
Dr. Linkletter: True.
Dr. John Sturgis: In fact, most of his major accomplishments occurred when he was a young man, which you and I most certainly are not. [chuckles]
Dr. Linkletter: Sometimes I look in the mirror and I think, "Who is that?"
Dr. John Sturgis: Would you like to give these cucumbers a spritz?
Dr. Linkletter: No, thank you. Do you sell liquor here?