87:4.4

Still later the imagination of man envisioned the concept of both good and bad supernatural agencies; some ghosts never evolved to the level of good spirits. The early monospiritism of ghost fear was gradually evolving into a dual spiritism, a new concept of the invisible control of earthly affairs. At last good luck and bad luck were pictured as having their respective controllers. And of the two classes, the group that brought bad luck were believed to be the more active and numerous.