Ron Swanson lets April know that it was about the puzzle and her as a person, more than it was about the missing key.

Ron Swanson:

“I change my house locks every sixteen days. That key has been useless since the second Tuesday after I gave it to you. What matters is that I trust you, and admire you as a person.”

“I will be sorry to see you leave this town for many reasons. Not the least of which is that you created a puzzle that even I couldn’t solve.”

“And boy, oh boy, did you love Andy. Woof, woof. It really is embarrassing.”