Authors:

Yet I think the demon's target is not the possessed; it is us . . . the observers . . . every person in this house. And I think---I think the point is to make us despair; to reject our own humanity, Damien: to see ourselves as ultimately bestial; as ultimately vile and putrescent; without dignity; ugly; unworthy.

William Peter Blatty (2015). “If There Were Demons Then Perhaps There Were Angels: William Peter Blatty’s Own Story of the Exorcist”, p.10, Macmillan
Yet I think the demon's target is not the possessed; it is us . . . the observers . . . every person in this house. And I think---I think the point is to make us despair; to reject our own humanity, Damien: to see