Doors invite one to come in or hinder one from doing so. We choose which doors to enter; which ones to just pass by. Some doors are left widely opened; some doors you still need to open, while for some you have to wait for someone to open for you. There are doors we can simply barge into; while others we need to knock. There are doors that people force their way in, but it won’t mean one will be welcomed. And there are those doors that are held open, just waiting for you to come in.