Characters
He puzzled and puzzled till his puzzler was sore. Then the Grinch thought of something he hadn’t before. Maybe Christmas, he thought, doesn’t come from a store. Maybe Christmas, perhaps, means a little bit more!
— Narrator • How the Grinch Stole Christmas!

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The narrator shows the Grinch straining his brain until a new thought lands. Christmas, he realises, might not be something bought in a shop. The unwrapped gift fits that idea of meaning beyond store-bought things.
Context reviewed