Bell, book and candle.
Christians believe in ghosts, or disturbed spirits,
call them what you will: they perform exorcisms.
I don 't believe that it is a matter of religion (except on this thread).
Its that like u can see a radio n hold it in your hand,
but u can t see a radio wave, which is what gets it to do what matters.
Likewise, u can t see the conscious, living mind.
Large numbers of people who have returned from death
(meaning flat lines on EKG, EEG, n respiration monitors for a while)
have described observing from above, as rescue efforts
were exerted on their behalf by medical personnel
in additional adventures; (as a result of which some folks were disinherited).
It has been said that if the life force of a man is mentally unhealthy,
or "disturbed" (perhaps by violence) he may remain around,
not being aware of the passage of time.