Adult Sheldon: Many cultures throughout the world relied on percussion to send messages across long distances. For example, the West African dundun was used to imitate human speech... [loud music playing] ...while I used my fist, the wall of my dorm, and Morse code to send a message.

Adult Sheldon: I didn't realize until years later that my father was only asking questions about lightning and thunder to cheer me up. In fact, he would often pretend to be dumb just to make me feel better.

Adult Sheldon: My father didn't always get the credit he deserved. The advice he gave me actually worked out pretty well. Of course, I never told him.
George: Talked to Billy.
Missy: Why would you do that?
George: No, it was good.
Missy: Stay out of my life.
Adult Sheldon: He may not have been the world's greatest dad. But maybe we weren't the world's greatest kids.

Pastor Jeff: Before our final prayer, would anyone else like to say a few words?
Mary: Missy? [Missy shakes her head] Shelly?
[Sheldon stands up and walks up to the microphone]
Sheldon: I've been thinking a lot about the last moments I had with my dad. It was morning, and he was leaving for work. He said, "See y'all later." And I said nothing. I regret that. I could have said "bye" or asked him for a ride. Or told him that I loved him. But I didn't. I barely noticed he left. So many times that I didn't notice my father. I hope he knew how much I loved him.
Adult Sheldon: I wish I could tell you I said all those things. But I didn't.
Mary: Shelly? [Sheldon shakes his head] [Mary shakes her head to Pastor Jeff]
Pastor Jeff: Let's bow our heads in prayer.
All: Our Father, who is in heaven, hallowed be Your name...
Adult Sheldon: For a long time, I focused on my father's shortcomings. Now that I'm his age and have kids of my own, I realize he was just a person doing the best he could, and he did a lot. I didn't say it at his funeral, but I can say it now. I loved my father. I will miss him forever.

Paige: I'm messing with you. It's just, sometimes life sucks, and it's easier not to deal with it.
Sheldon: Could you be more specific?
Paige: Um... well, I have no friends, I don't fit in anywhere, and I dropped out of college but I'm too young to get a job, so killing brain cells makes it easier.
Sheldon: Huh.
Paige: Go ahead, smart guy, fix me. [Sheldon is silent] Mm.
Sheldon: Well, give me a minute.

Sheldon: What are you doing here?
Paige: Would you believe me if I told you I was working on a femtosecond laser in the engineering department?
Sheldon: Yes.
Paige: Then that.

Georgie: You know what else is nice?
George: Hmm?
Georgie: I get to learn from all your parenting mistakes.
George: I'm starting to think letting you live this long was one of 'em.
Georgie: Like that. I'd never say something so awful to my kid. [George scoffs] Thanks, big guy.