Meemaw: Sheldon, what’s on a person’s face is not always what’s in their heart.
Sheldon Cooper: Well, this changes everything. How do you know who to trust?
Meemaw: You don’t. That’s what makes life interesting.
Sheldon Cooper (narrative): Meemaw liked to teach me things that kept me awake at night.
From Young Sheldon – Season 1 Episode 3: ‘Poker, Faith and Eggs’ (1×03)