what is the meaning of familiar spirits
by Matt Slick. A familiar spirit is a demon that is summoned by a medium with the intention that the spirit summoned will obey his or her commands. Often, familiar spirits are believed to be the spirits of people who have died (Duet.18:11). However, Biblically this is not the case.y Matt Slick. A familiar spirit is a demon that is summoned by a medium with the intention that the spirit summoned will obey his or her commands. Often, familiar spirits are believed to be the spirits of people who have died (Duet. 18:11).