Mystery See also Mysteries of Godliness; Secret; BD Mystery mystery of iniquity doth already work, 2 Thes. 2:7. upon her forehead was a name written, Mystery, Babylon, Rev. 17:5. priests … brought them to believe, by … their pretended mysteries, Alma 30:28. that the mysteries and the works of darkness … may be made manifest, Alma 37:21. mysterious arts of the evil one, Hel. 16:21.