Great Deceiver [final] < TRUSTED - 2024 >

A 2023 report in the Journal of the American College of Chest Physicians titled "Disseminated Blastomycosis: The Great Deceiver" details a case of a fungal infection that presented with symptoms easily mistaken for other pulmonary issues, illustrating why clinicians use this nickname for the disease.

Recent sermons, such as those by Pastor Greg Laurie and Dr. David Jeremiah , focus on identifying these deceptions in a world of "fakes," including the rise of AI and secular substitutes for spiritual connection. Medical & Scientific Reports

The phrase is also used as a metaphor for diseases or biological elements that are difficult to diagnose because they mimic other conditions.

In eschatological (End Times) studies, the Great Deceiver is expected to appear before the return of Christ to mislead believers and the world. A central tactic described is mimicry —imitating God’s attributes to trick people into worshiping the devil under the guise of religious righteousness.

The term is rooted in scriptures such as Revelation 12:9 , which describes the "great dragon... called the Devil, and , which deceiveth the whole world".