The phrase is also used as a metaphor for diseases or biological elements that are difficult to diagnose because they mimic other conditions.
In Christian theology, "The Great Deceiver" is a title primarily attributed to or the Antichrist . GREAT DECEIVER [Final]
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". The phrase is also used as a metaphor
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. GREAT DECEIVER [Final]