I agree ...... demons can mimic the likeness of a deceased person for all sorts of reasons. They have fun scaring people in old houses but the #1 reason they "haunt", imho, is to discredit the Bible on its teaching about Heaven and Hell.

My dear parents were unbelievers as far as I know {there's always hope a person may have quietly called out to Jesus at the end}. After my Mom died, my grieving Dad swore emphatically that she would sometimes be standing in the living room, smiling, surrounded by a beautiful glowing light. He told everyone who'd listen that it was no illusion .... that her spirit was really there. He was certain she had come back to comfort him. As an unbeliever at the time I was skeptical but kept an open mind.

A few months later I was saved and learned what paranormal apparitions really are. I had a talk with my Dad -- gently telling him it wasn't my Mother he had seen but a cruel deception by Satan meant to confuse him. I explained that God does not allow the dead to visit the living, and that their eternal destiny is in God's hands depending on if they had faith in Christ or not.

With tears streaming down his face, my sweet Dad heard the Gospel.....all because a demon decided to mess with him. I can't say for sure if he eventually gave his life to Christ at some point but a couple of times when I popped by his house I "caught" him listening to preaching on Christian TV or radio.