George Sr.: What you doing?
Sheldon: Paige is feeling sad, so I'm making her a hot beverage.
George Sr.: Oh. You're a good kid. I'm proud of you.
Sheldon: Thank you.
Adult Sheldon: Of all my accomplishments, I don't know why he singled this moment out, but I'm glad he did.

Adult Sheldon: I had survived a perilous trip to the accessory store, but it turned out, the real accessory was me.

Mary: So, good news. Paige is gonna spend the weekend with us.
Adult Sheldon: My history with Paige brought up complicated feelings. She challenged me. She disturbed me. She enraged me. Things were simpler for my simple-minded sister.
Missy: Yay!

Adult Sheldon: Pastor Jeff and Officer Robin finally had their ceremony, which was nice for them, but meant I had to go to church on a Saturday and watch old people kiss.

Adult Sheldon: Fortunately, having a modem granted me access to an even better kind of friend: the kind you don't have to see or talk to.

Adult Sheldon: None of my friends had recorded the episode. I called Tam. I called Dr. Sturgis. Those were all my friends.

Adult Sheldon: Many inventions changed people's lives for the better: the light bulb, the polio vaccine, and one that doesn't get enough credit, the home video cassette recorder. It didn't help keep people out of wheelchairs, but it did keep me from missing Star Trek.

Adult Sheldon: The following day, I returned to school. I had no choice but to fulfill my swimming requirement. Much like Batman, I suited up and faced my fears. Unlike Batman, I did it with a doggy-paddle across the shallow end of the pool. Uh, regarding pool sanitation, it turned out I was right. It was teeming with germs. Only I was the one who put them there. As it happens, my interaction with Billy Sparks did get me sick. I, in turn, created a small epidemic taking down 128 students, four teachers and one principal. It didn't stop there. I also infected my mother, father, sister, brother, Meemaw and Meemaw's friend Dale. The newly established boundaries of friendship helped keep Dr. Sturgis healthy. However, in an unrelated incident, he crashed his bike into some garbage cans. Luckily, he landed on his recently acquired athletic cup.
Dr. John Sturgis: That was a wise purchase.

Adult Sheldon: I had lied to my mother and gotten away with it. The guilt was more than I could take. I had to make this right. I could confess and break my mother's heart, or I could turn my lie into the truth and actually get myself sick.

Adult Sheldon: Observation is an important part of the scientific method. Darwin observed the finches, Jane Goodall observed the chimpanzees, and for some reason, Dr. Sturgis wanted to observe my meemaw's new suitor.

Principal Petersen: Sorry, Sheldon. Water safety is a required part of your P.E. class.
Sheldon: But other kids use that pool. It's basically a big bowl of teenager soup.
Principal Petersen: It's out of my hands. It's a state requirement. If you don't like it, take it up with your congressman.
Sheldon: I did. He won't return my calls.
Principal Petersen: Then I guess you're swimming tomorrow. [manic laughter, thunder clap and lightning]
Adult Sheldon: Except for the laughter, the glowing eyes and the lightning, that's exactly how it happened.

Adult Sheldon: In many ways, a high school is like an academic house of horrors. There's the cafeteria, which when even freshly cleaned, maintains a subtle aroma of tater tots and throw-up. The schoolyard, where one is exposed to bullying by delinquents and attacks from above by eye-pecking demons. [bird tweets] But all of these pale in comparison to the most horrific location of all. A place teeming with the sweat and secretions from hundreds of unwashed bodies. The swimming pool.

Adult Sheldon: Before that disembodied voice on AOL started saying, "You've got mail," we relied on my mom.
Mary: Shelly, you've got mail!
Adult Sheldon: Some mail brought great joy.
Sheldon: Greetings, Mr. Spock.
Adult Sheldon: Some mail brought pain.
Mary: George, you got jury duty!
George Sr.: Tell 'em I died!
Adult Sheldon: And one time, mail caused a war between neighbors rivaling that of the Klingon Empire and the Federation, which trust me was a doozy.

Adult Sheldon: Eventually, my mother relented and returned our things with a few minor adjustments.
Missy: What's The Moosewood Gang?
Mary: They solve mysteries while they learn about God.
Missy: Great.
Adult Sheldon: Georgie got his music back.
George Jr.: [as Jesus Christ Superstar plays] What the hell is this?
Adult Sheldon: And as for college, my mother and father discussed it and decided that ten was too young. So I didn't start till the ripe old age of 11. In the meantime I had the key to one sweet bathroom.

Mary: That is it! I am taking this house back from the devil.
Missy: Hey.
Adult Sheldon: I've been accused of overreacting from time to time. But perhaps it's hereditary, because look at my mommy go.

Sheldon: [answering phone] Cooper residence.
Dr. John Sturgis: Hello, Sheldon.
Sheldon: Dr. Sturgis. I'd love to talk to you, but I'm right in the middle of Star Trek: The Next Generation. It's a good one. Geordi goes missing, but Wesley Crusher has a plan to use neutrinos to locate him, since they'd be visible to Geordi's visor.
Dr. John Sturgis: I was actually calling to speak to your father. But I'm glad you're having fun with your friends.
Sheldon: Hang on. I'll go get him. Dad! Phone call!
Adult Sheldon: Even though Dr. Sturgis was confused, one day, Wesley Crusher really would be my friend. Neat, huh?

Lisa: [modem screeching] What's that noise?
George Jr.: No idea.
Sheldon: Georgie, I need you to get off the phone.
George Jr.: Hang on, Lisa. I'm helping someone with their English homework.
Sheldon: I don't have time for jokes. I need the phone line to connect my modem.
George Jr.: What the hell's a modem?
Sheldon: It links my computer to an interconnected web of other computers in order to facilitate the exchange of ideas.
George Jr.: That's the stupidest thing I've ever heard of.
Adult Sheldon: Sadly, that was not the stupidest thing he ever said.

Adult Sheldon: Thanks to Dr. Sturgis, I had all the intellectual ammunition I needed to bring my opponent to his knees. I accused him of conflating two different interpretations of quantum theory, woefully misrepresenting Paul Dirac, and when I called him a dung beetle in Latin, I was so riled up, I almost started producing testosterone.

Sheldon: Ooh, the long-awaited rebuttal. "While I still believe my theory has merit, I will concede that your point has some validity." My point has some validity. My point has some validity! Yes!
Adult Sheldon: That day, both my sister and I emerged victorious from savage battles. Hers fought with fists, mine with words.
Sheldon: What does my point have? Some validity!
Adult Sheldon: Although we were both pretty sore the next day.

Adult Sheldon: Having found no answers, I took it upon myself to rectify the inconsistent timeline in Lord of the Rings. J.R.R. Tolkien had a brilliant mind, but let's be honest. He was no S.L. Cooper.