Aguest
"When they're visible, they look like ordinary people, animals, or plants, dear FP (peace to you!). This is because they cannot manifest on their own (they have no physical bodies nor "light" to reflect) and so must use a "host"... and only living things can provide host residency (so, you can dismiss any fears for the "demon-possessed" table from the swap meet - ). Because of this it is not by their appearance that they can be recognized; rather, it is by either the manifestation of their works/conduct or their self-identification. "
When I was a child I saw what most people would call a ghost walking down the stairs of our house. It opened the dining room door and disappeared. Some little while later my father saw it and it pushed past him and when into the kitchen one evening, later that night he saw it on the stairs like I had. It looked like my Grandfather who we lived with but only because of the blue cardigan he had obtained from his brother who was a spirit medium and he would wear the cardigan. We had other problems in the house for several months until the blue cardigan was gone. We didn't know that my grandfather had gotten the cardigan from his brother until my father enquired. There seemed to be a connection to the article of clothing. My grandfather also at this point would talk to somebody who was not visible to me and I could not hear. This cardigan seemed to be a connection to something else. What do you think?