I am not quite sure how this analogy goes, but this idea came across me as I was thinking of the loss of a dear friend. I believe that when we are born, our hearts are formed of empty rooms, and these rooms have specific guest names on their doors. When such guests visit their rooms, the owner, the guest, and sometimes both instantaneously know that everything is in place. We do have temporary visitors that visit such rooms, but they are temporary visitors as the name states. When one of the room owners leaves, his or her name stays forever on the door, and the emptiness of their room can never be filled.