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 Sr.: Talked to Billy.
Missy: Why would you do that?
George Sr.: 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.

Adult Sheldon: I've fought many digital battles in my life, but none are as memorable as this first one with my Meemaw. By handing me the controller, she was telling me she believed in me. That inside my small, fragile frame beat the heart of a hero.

Adult Sheldon: Visiting Tam's house for the first time was an emotional roller coaster.
For example, it's traditional in Vietnamese homes to have gruesome religious iconography near the entrance. I did not like that.
However, it's also customary to not wear shoes around the house for sanitary reasons. I did like that.
Interestingly, one of the main ingredients in Vietnamese cooking is an extremely pungent condiment known as fish sauce. I did not like that.
But before every meal, it's common for everyone to wash their hands and face. I did like that.
Forks are not customary in a Vietnamese household. I did not like that.
And instead of napkins, there was one towel for everyone to share at the table. Seriously, what are they thinking?

Adult Sheldon: In that moment, I had an epiphany. I could draw up a contract for any social relationship. It was a helpful way to remove ambiguity in a world that was often hard to understand. Article three Sheldon will not spy on Meemaw's house with binoculars.

Adult Sheldon: Since that night, I've battled orcs, zombies, Nazis, Nazi-zombies, a dinosaur in a go-kart, and played Van Halen's "Hot for Teacher" on a stringless, plastic guitar. But nothing would ever compare to that first quest with my meemaw. Although Leonard pulling a groin muscle doing Dance Dance Revolution was a close second.

Adult Sheldon: As you can see, sometimes a person can be both incredibly intelligent and full of baloney.

Adult Sheldon: Anger is an ugly emotion. Unbridled rage even more so. And when it bubbled up inside me, I channeled it the only way I knew how. I cleaned the house like a man possessed.

Adult Sheldon: Just like that, I overcame my fear of choking. All that was left was my fear of dogs, birds, insects, germs, hugging, button fly pants, rivers, ponds, lakes, oceans, estuaries, corduroy, root vegetables, squeaky balloons, tinted windows, take a penny, leave a penny, fireworks, potbelly stoves, dust bunnies, that fuzz on peaches.

Adult Sheldon: Over the next few days, I ran to my Meemaw's house so we could save the 8-bit princess. And if it's unclear how important this was, let me say it again: I ran.

Adult Sheldon: Even while sleeping, my quest to save the princess continued, which was quite a departure from my usual dreams, such as determining the coolest prime number Which, by the way, is 73.

Adult Sheldon: Ignoring things that irritate me isn't my strong suit. Obsessively fixating on them, now that's what gets me out of bed in the morning.

Adult Sheldon: A primary feature of quarks is that they're always bonded together, but in that moment, I felt like a neutrino, destined to be alone forever.
[Montage of young Leonard, Penny, Raj, Howard, Bernadette and Amy at that moment]
Adult Sheldon: Thankfully, I was wrong.

Adult Sheldon: As you can see, my meemaw successfully lured me back into the world by reminding me of my brave Texas ancestors. Their blood ran through my veins. I was a true son of the Lone Star State. Albeit a true son with an incredibly fragile immune system. I woke up the next morning with a temperature of 102 and a head packed full of mucus.

Adult Sheldon: That was the first time I held my father's hand. I wouldn't touch my brother's hand until seventeen years later, thanks to the invention of Purell.

Adult Sheldon: I never did get to see a launch in person, but that was the best trip I ever had. I wish I had told my father while he was alive.

George Sr.: Damn it. I've had enough of this. Sheldon, get up.
Sheldon: What's the point?
George Sr.: We're going to Houston.
Sheldon: Really?
George Sr.: Yeah. You and me are gonna give those space monkeys a little talkin' to.
Adult Sheldon: I often found my father to be a strange and puzzling man, but at that moment, I never loved him more.

Adult Sheldon: People often wonder why I chose to pursue a career in theoretical physics. I usually respond by saying I wanted to unravel the inner workings of the universe. But the real answer was I wanted to prove this nincompoop wrong.

Adult Sheldon: I've often been asked why I never learned to drive a car. This night is your answer.

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.