The background of early Christian demonology was in both Hebrew and Greek culture. Jews associated the Greek word daimōn with the false gods of the surrounding nations. This was in many ways an intuitive application of the Greek term. It carried the sense of ambivalent divine or semi-divine power, which significant philosophical traditions understood to mediate between humans and gods. The New Testament carries this theme, though its focus is more on Christ’s exorcisms of demons, and his gift of that power to his disciples, with the early church tying the two together in the theological literature, as well as baptismal exorcisms and renunciations of the devil and idolatry.
Demons were widely thought to have aerial bodies, which allowed them to perform various marvels, like foretelling the future. They were ultimately taken to be fallen angels with Satan as their leader, though this was not a given early in the tradition. While the Christian understanding was that Christ had defeated them on the cross, this was not taken to preclude the ongoing influence of demons in human affairs prior to the final judgement. Indeed, they constituted a significant moral problem for the Christian life, which absolutely opposed them. For Christians, Christ and the demons were the two sides of the fundamental dilemma of every human soul. The problem of demons manifested differently depending on the context, whether in its encounter with false religion, from idolatry to the persecutions the gods inspired; or in the innumerable tempting thoughts encountered in the pursuit of ascetic discipline.
