Adult Sheldon: [hushed] This is why the only bar I frequent is the Genius Bar at the Apple Store.

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?

President Hagemeyer: Okay, so, what's the problem?
Sheldon: I wanted to talk with Dr. Linkletter about puberty.
Dr. Linkletter: And I wanted to avoid litigation.

Missy: Sheldon, there has to be stuff you're excited to do.
Sheldon: Of course. Getting my PhD, winning the Nobel Prize, getting to meet Professor Proton, working with Stephen Hawking.
Missy: Okay, so, when you start to get upset, focus on that stuff.
Sheldon: But... what if I grow up and none of those things ever happen?
Missy: All you can do is try and find out.
Sheldon: Those are the fundamentals of the scientific method.
Missy: No doy.

Meemaw: Ooh, I love this song. [Meemaw sings along to "Ring of Fire" by Johnny Cash] ♫ Bound by wild desires ♫ ♫ fell into a ring of fire ♫
George Jr.: My life's falling apart and you're singing?
Meemaw: ♫ I fell into a burning ring of fire ♫ ♫ I went down, down, down ♫ ♫ And the flames went higher ♫ ♫ And it burns, burns, burns ♫ ♫ That ring of fire ♫ [talks] Where?
George Jr.: The ring of fire
Meemaw: [vocalizes] [mimes playing a trumpet]