Amazon.com description: Product Description: "[...]the conventional use of it to designate the less beneficent powers and qualities, which originally inhered in every deity, after they were detached from these and separately personified. Every bright god had his shadow, so to say; and under the influence of Dualism this shadow attained a distinct existence and personality in the popular imagination. The principle having once been established, that what seemed beneficent and what seemed the reverse must be ascribed to different powers, it is obvious that the evolution of demons must be continuous, and their distribution co-extensive with the ills that flesh is heir to. [...]".