Adult Sheldon: Whenever I wasn't being challenged intellectually, my brain was more than happy to step up and accommodate. It was like having the perfect playmate in my skull.

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: 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?

Sheldon: I've been corresponding with Dr. John Sturgis at East Texas Tech. He said I could audit his course.
Meemaw: You're pen pals with a stranger? Is this okay?
Sheldon: He's not a stranger. He's a famous scientist. He carbon-dated the oldest human feces.
Meemaw: That ain't strange.

Mary: Now, Shelly, I appreciate that you want to expand your horizons, but how would you even get there? The school's an hour away. I'm working, your dad's working.
George Jr.: Again, who cares? Let him go.
Missy: He could hitchhike.
George Jr.: Perfect.

Meemaw: So, how was everybody's day?
Sheldon: I'm done with high school.
George Sr.: What does that mean?
Sheldon: Well, I don't learn anything there, and I don't want to go anymore.
Mary: Well, where do you think you're gonna go?
George Jr.: Who cares? Let him go.