Everyone who dies leaves behind what can be called an “astral shell” which is the remnant of the least spiritual, the most mundane, and the most sensual portions of themselves from the lifetime just ended, these particular aspects and characteristics naturally being unsuited and unable to enter into the spiritual heavenly state which Theosophy calls “Devachan”. This is not the actual individual soul but is simply a senseless subjective form which eventually disintegrates, usually within a few decades at the most. This “shell” contains a large portion of memories and knowledge which the individual possessed during that lifetime but these are merely discarded and gradually fading remnants, without any actual individual consciousness behind them, as the actual soul will now have entered into Devachan and be beyond the reach of anyone on the physicalplane.
These astral shells or “Kama Rupas” roam senselessly around in the Kama Loka and are easily contacted by those with mediumistic tendencies or psychic sensitivity. Since they are able to senselessly repeat and recite certain pieces of information and knowledge which the individual possessed during its life on earth, they are easily mistaken by many to actually BE the real departed soul.
It is these astral shells, these Kama Rupas, which comprise the majority of the entities contacted by mediums and in Spiritualistic gatherings.