Adult Sheldon: Dr. Sturgis was a wise man. It was a learning opportunity. And when the day comes that I'm wrong, I fully plan to admit it.

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.

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.

George: I may not understand exactly what's going on with you and Dr. Sturgis, but you can't be rude to an adult.
Sheldon: What if they're wrong?
George: Doesn't matter. There are plenty of stupid people in the world, but when they're older than you, you got to show them respect.
Sheldon: I understand, sir. Thank you for your incredibly wise advice.
George: Okay.
Missy: Did you just call Dad stupid without calling him stupid?
Sheldon: Yes.

Ms. Ingram: Today we're gonna work on interior angles of a convex polygon. Georgie, where's your brother?
Georgie: I don't know, do you really want him here?
Ms. Ingram: Convex polygons are polygons...

Ms. Hutchins: Sheldon, why aren't you in second period?
Sheldon: I'm working on this math problem.
Ms. Hutchins: I think you might be the first person in history who's ever cut class to do math.
Sheldon: The irony wasn't lost on me.