In the so called Christian world there are mostly misunderstandings with regard to the Bible teaching about death, souls, spirits.

According to the Bible, the dead are actually dead, as in not concious or alive anywhere, they have no memory, no wisdom, no thoughts, and no part of anything that happens on earth.

There are "spirits" and "ghosts" but theyre not of this earth. The Bible warns against communicating with them and forbids consulting those who do. That should tell you quite clearly what they are.