To resume: Daemonomania may be considered the result of a morbid condition
of the mind, and the dread of supernatural agency. The belief of an
incarnation of the devil leads to the natural apprehension of his having
taken possession of our bodies, when a credulous creature fancies that he
has fallen into his snares, and forsaken the ways of the Omnipotent. This
sad delusion has been admirably illustrated by Sir Walter Scott in his
curious and learned Demonology. "It is, I think," says he, "conclusive
that mankind, from a very early period, have their minds prepared for such
events (supernatural occurrences) by the consciousness of the existence of
a spiritual world. But imagination is apt to intrude its explanations and
inferences founded on inadequate evidence. Sometimes our violent and
inordinate passions, originating in sorrow for our friends, remorse for
our crimes, our eagerness of patriotism, or our deep sense of
devotion,--these, or other violent excitements of a moral character, in
the visions of the night, or the rapt ecstasy of the day, persuade us that
we witness with our eyes and ears an actual instance of that supernatural
communication, the possibility of which cannot be denied. At other times
the corporeal organs impose upon the mind, while the eye and the ear,
diseased, deranged, or misled, convey false impressions to the patient.
Very often both the mental delusion and the physical deception exist at
the same time; and men's belief of the phenomena presented to them,
however erroneously, by the senses, is the firmer and more readily
granted, that the physical impressions corresponded with the mental
excitement."