Adult Sheldon: Classical physics can predict a lot about the world. For example, it can tell us what happens when one pool ball knocks into another. But when multiple balls careen in different directions, we've entered the wild and woolly world of nonlinear dynamics. And you don't need me to tell you that it's impossible to predict what will happen next. Actually, based on the state of our educational system, you probably do. Now imagine those are people. Even a brilliant young ball who graduated high school at 11 can be caught in the maelstrom. Aah! Our first collision was set in motion when Pastor Jeff and Robin had their baby.

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: Where are we going?
Missy: Right there.
Sheldon: An old shack in the middle of the woods? Have you even seen Scooby Doo?
Missy: Great, go home.
Sheldon: At night, by myself? Nice try.

Mary: You are right. You have been here longer than me. I don't see why we can't work together.
Peg: That'd be nice.
Mary: Great. So, why don't you go by the bank, and I will drop off the bulletin?
Peg: So no one's gonna answer the phones?
Mary: Fine. You just sit there, and I'll go and do everything.
Peg: Sweet. Oh, today's a stumper. Is "nipto" a word?
Mary: You know what? This is why I was taking charge of everything. Because if I don't, nothing will get done.
Peg: Oh, it's "pinto". [laughs]
Mary: This is exactly what I'm talking about.
Peg: Guess what, Mary. Things were getting done long before you got here.
Mary: I just want everything taken care of for Pastor Jeff.
Peg: Or you just like thinking you're better than everybody.

Pastor Jeff: Isn't he the cutest?
Mary: He sure is.
Peg: Oh.
Pastor Jeff: Yeah, he's an angel. He's just happy all the time... morning, afternoon, middle of the night, 2:00a.m., 3:00a.m., all the a.m.'s, really.
Peg: Dip the pacifier in some whiskey, put him right out. But don't use the good stuff. They can't tell the difference.