Christian demonology
Christian demonology is the study of demons from a Christian point of view. It is primarily based on the Bible (Old and New Testaments), the exegesis of these scriptures, the scriptures of early Christian philosophers and hermits, tradition and legends incorporated from other beliefs.
Development
In monotheistic religions, the deities of other religions are sometimes interpreted or created as demons. The evolution of the Christian Devil and pentagram are examples of early rituals and images that showcase evil qualities, as seen by the Christian churches.
Since Early Christianity, demonology has developed from a simple acceptance of demons to a complex study that has grown from the original ideas taken from Jewish demonology and Christian scriptures. Christian demonology is studied in depth within the Roman Catholic Church, although many other Christian churches affirm and discuss the existence of demons.
Albertus Magnus said of demonology, "A daemonibus docetur, de daemonibus docet, et ad daemones ducit" ("It is taught by the demons, it teaches about the demons, and it leads to the demons").