I thought this was interesting when doing my bible study, I stumbled across this article, albeit, I cant give the author credit since I forgot where I was.
Apart from ancient Pagan writings with ghosts, You most likely know, Christianity also offers its share of ghost stories. Just about all saint apparitions are ghost sightings. They will often come as good mood, to work some miracle, to advise and guide those that believe in them, or they may come demanding anything to be done or as angry mood,
In the dawn of Catholicism, the Church accepted that intervention of ghosts been around, slowly the opinions of the people inside this religious beliefs has changed. In the 16th century, with the 2nd great division of the Church - between a Catholic and a Protestant one - occured, the Protestants adapted most of the Catholic rules and began to preach that although the souls with the dead could inhabit your Purgatory, Heaven and Hell, the spirits that will appear to the trustworthy were mere illusions or demons in the shape of their loved ones. And another change in the belief of the Protestants would happen through the rule of King Adam I of Britain, the one who claimed that the Bible was re-written and also the reviewers had to make all kinds of adjustments to it, to fix the view of their superior.
This Bible is the one that has been used throughout the time by all the Protestant religions around the world. King James was caught as a fanatic who witnessed a myriad of demonic acts anywhere he or he thought, he showed that apparitions, all ghosts and all spiritual intervention weren't in the Church, we were looking at the works of Satan.
When the 18th century came, that European world was completing through crucial changes in philosophy and all spiritual manifestations began to be regarded with skepticism, including those relating to the Christian belief.
In the 19th century Allan Kardec useful to teach several different sciences with his home, such as Chemistry and Anatomy, and he had been a student involving Medicine, he or she always explained his beliefs in the scientific way and in 1857, he or she published "The Book of the Spirits" in which he established the foundation of the Spiritism, he explained his beliefs in simple terms, which were considered subversive by the Catholic Church right away. But even though this different approach, the Spiritism is totally based on Christianity. While the beliefs of the Western world changed through the centuries, due to the control that the Catholic Church had on the knowledge of the instances, in the Eastern world the beliefs continued much the same. A number of the Eastern religions accept that the souls of the dead can appear to the living and that reincarnation can be done.
As you know, this is one of the most complex subjects associated with human knowledge, since there's much myth and a myriad of lies involved in it and everyone, as per their own beliefs together with creeds, regards it in another way.
Those who claim to be religious mediums themselves, a poor reasons to believe they have contact with the souls with the dead and those who believe they've already seen angels, new orleans saints, gods, enlightened spirits, challenges, etc, people obviously see no reason in doubting the power of the spiritual nation.