Adult Sheldon: My role as Dr. Linkletter's lab assistant was progressing nicely. I had mastered operating the manual particle collector, aka a broom. I may not always recognize sarcasm, but I sure know how to use it.
Dr. Linkletter: Sheldon, I've hit a bit of a roadblock with the solar neutrino detector. Why don't you come have a look?
Sheldon: Are you saying you would like me to take part in your experiment?
Dr. Linkletter: Well, I think a fresh set of eyes might be helpful.
Sheldon: Because my previous observations proved correct?
Dr. Linkletter: Yes.
Sheldon: And had you listened to me, the lab wouldn't have caught fire?
Dr. Linkletter: Yes.
Sheldon: So just to be clear, at the tender age of 11, I'll be officially participating in an academic study.
Dr. Linkletter: Will you do it or not?
Sheldon: Absolutely. [hands Dr. Linkletter the broom] Here you go.
Dr. Linkletter: What am I supposed to do with this?
Sheldon: Well, if you can't figure that out, no wonder you need my help.

Sheldon: I started working on this presentation to address specific ethical dilemmas. The laws of robotics, whether torture can be justified, and cloning people for fun and spare parts. But I realized before resolving any of these moral quandaries, the real decision is who gets to decide. Do we put it up for a vote? Does everyone get to decide for themselves? Should it be by committee? Is that committee elected or appointed? You see where I'm going? You probably don't. For the smartest decision, we need the smartest person. Ladies and gentlemen, in the field of scientific ethics, we can't rely on democracy or plutocracy. We need an autocracy, or to be more precise, a "Sheldocracy." [slams fist] [military march plays]
Dr. John Sturgis: Um, I don't think this was the assignment.
Sheldon: Sorry, Dr. Sturgis, I pick the assignments now. Everybody, for next class, I want 500 words on what you can do to further the Sheldocracy. Punishment for typos will be severe.
Dr. John Sturgis: Class dismissed.
Sheldon: Hey, that's my line.
Dr. John Sturgis: No, it isn't.
Sheldon: Why don't you see me after class. Class dismissed.

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.

Georgie: Remember, the smart cheater gets some answers wrong.

Pastor Jeff: Get this. I drove past the Methodist church and you know what the sign out front said?
Mary: What?
Pastor Jeff: "Friendship, pirate ship, try the best ship... worship."
Mary: Clever.
Pastor Jeff: That was our sign last year! I wrote that!
Mary: Isn't the most important thing that it might get more people to go to church?
Pastor Jeff: But whoever did it has the sin of stealing on their soul now, so at least there's that.
Mary: There you go.

Dr. Linkletter: So, the problem that I'm running into is I can't get the inner sphere to remain suspended in the buffer liquid.
Sheldon: Have you tried wrapping the sphere in copper wire?
Dr. Linkletter: I did, but it just slips out.
Sheldon: Perhaps we could suspend it in some sort of sleeve.
Dr. Linkletter: That would prevent light from getting through.
Sheldon: Hmm. [strokes chin] I wonder if my thinking would be more effective if I had a beard to stroke. It's one of the few aspects of puberty I'm looking forward to.