You go through the door, following the cat. Once inside you see a
great golden statue of a cat and wonder how it could have survived all
these years without being stolen. The cat turns and stares at you and
says "I knew you were thinking that". "The statue has
remained here only because a select few can actually see it."
The cat continues, "I could sense that you were nice people who
would do us no harm, so I decided to share our secret with
you".