Nicene and Post-Nicene Fathers: Series I/Volume II/City of God/Book IX
Book IX.
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Argument—Having in the preceding book shown that the worship of demons must be abjured, since they in a thousand ways proclaim themselves to be wicked spirits, Augustin in this book meets those who allege a distinction among demons, some being evil, while others are good; and, having exploded this distinction, he proves that to no demon, but to Christ alone, belongs the office of providing men with eternal blessedness.