Symbolism.
There's this door I want to get in, but it's not open. I can peek at the window, but the curtains are drawn.
There's another door that I can enter freely, but it's sorta dark inside. Yet in a way, it feels so comfortable.
There's a third door that I may be able to come in to, but I think it's not the place I truly want.
I wanted to get back to the first door. It's what I want.