Ghosts are real. They aren't those creepy dead people on ghostbusters or shining lights on Ghost Hunters. They are the dead that have been caught in a loop or, very rarely, sent back for being in the middle. If there was enough good to balance bad, they are sent back to highten the other. If sent by the devil, they return to haunt. If sent by saint peter, they return to help in odd, but still helpful, ways. Or, they are caught in a loop. During their stay on earth, they are just a bit to one side of the good/bad deal. They usually think they are going one way, which influences which way they do go. If it is the opposite of their true way, they are caught in a loop. They are the rope in a game of tug-a-war between St. Peter and the Devil.