Spirit possession, a fashionable field of study among anthropologists, is still a delicate topic among Western theologians. this article attempts to show that the concept can be applied to Christian as well as non-Christian cultures. It defines spirit possession as a mode of communication between believers and an ‘unseen’ being, and discusses various aspects of it. It particularly looks into the aspect of power and discusses the case of Milingo, former Archbishop of Lusaka, from this perspective.