Irenaeus Against Heresies Book I It appears probable enough that this man possesses a demon as his familiar spirit, by means of whom he seems able to prophesy,[163] Tertullian De Spectaculis accordingly, when the unclean creature was upbraided with having dared to attack a believer, he firmly replied,[24] Cyprian Epistle LXXV And this also is done in the present day, in that the devil is scourged, and burned, and tortured by exorcists, by the human voice, and by divine power;[35]