when a book isn’t the same as you remember

I reread Harry Potter and the Half-Blood Prince on a whim this weekend and discovered a richer experience than I’d remembered from previous re-readings. More significance to how the characters communicated with each other, to the choices they made and to their identities, to whom and how they loved. 

Of course it wasn’t the book that changed.

Is that idea at the base of anything we return to or repeatedly do? That it’s probably not those things or tasks that have changed, but that we have.