Jekyll and Hyde

"Jekyll and Hyde" refers to a person who has two contrasting sides—one good and moral, the other dark and immoral. The term originates from Robert Louis Stevenson’s story about Dr. Jekyll, a kind scientist, who creates a potion that transforms him into Mr. Hyde, a cruel and violent alter ego. This duality highlights human complexity, showing how someone can exhibit both noble and sinister traits. It’s often used metaphorically to describe individuals or situations where conflicting personalities or behaviors coexist within the same person.