Hallucinations sometimes arise from thought and from mind. We call it "obsession" when it comes from without. Sometimes the living person can express and the spirit respond. We are not doing spirits any good by calling them when they have no body; we have a body. Why not let them forget the experience of this world of illusion rather than attract them? What good will it do them? One should only trouble others when one needs them very much. We should use ourselves as the vehicle of all experiences. We can communicate much better with another person who is clothed like us than we can with a spirit.