Once upon a time I believed in them. I thought perhaps when the physical body died, some kind of residue energy or other substance was temporarily left behind because of the mind/consciousness. Or that it is from different dimensions merging together briefly. I think now that those that have witnessed sightings actually had their minds playing tricks on them or was actually hallucinating. Anyway:
Do you believe in ghosts? If so, what do you think they are? And if not, why not?