Decades ago I studied with some visiting JWs and this fits in with their tenet that the dead are inert and on hold until the Judgement Day. Unless it’s changed or I’m remembering it wrong, of course.
Are you sure you mean ‘not’? Because seeing ghosts would seem to argue for the occult existing.
Be nice to find a Christian group that abjures belief in ghosts and demons…
By “not” taking seriously, I suspect he means “not taking it seriously enough to know that you need to leave it the hell alone, at the risk of your immortal soul.”
While some Christian traditions believe that the spirit of “Samuel” was actually a demon, I’ve heard of others who don’t buy that argument because Samuel gave Saul an actual prophecy and told him that God was angry with him for his misdeeds, which doesn’t sound like a very demon thing to do. Remember that Saul resorts to the necromancy that he himself outlawed because he can’t get an answer from God through the approved methods. Therefore, some Christians believe that God himself actually sent Samuel as a way of saying, “You wanted an answer? Well, you got one!”