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Within Mormonism are teachings of how to greet different kinds of angels, how to tell if they’re good or bad, and what role they play in the creation of the earth. This type of teaching mimics the beliefs of Gnosticism Paul warned us about in many of his epistles.
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On the introductory page of D&C it says this about the angel Moroni: “Joseph Smith received visitations from Moroni, an angel of light”.