there is a school of thought that suggests that not only is there an afterlife but we actually come into contact with it far more frequently than we would think
now this all conjecture so bear with me-imagine there is an imaginary wall between the living "us" and the dead "them"-now the dead are jealous of us because they are dead and can no longer enjoy the things they once did and we still can-and this is where supposed hauntings occur where the dead are just fooling with us, but hardly any of us have actually seen a ghost despite thousands of books/films suggesting that hauntings happen all of the time
now a more realistic scenario would be-you put your keys on the kitchen table, the telephone rings, you answer it and 10 minutes later you go to pick up your keys which are no longer there-you scratch your head and wonder and swear that you left them on the kitchen table-and you did but a spirit "reached" across and picked them up, watched you looking for them and put them back where you left them-when you come back, there are your keys, exactly where you left them
we have all done things like that
as i said, only conjecture, but it makes you think
dave