The Manifestation of Jill Castle’s Duality of Self in Sidney Sheldon’s A Stranger in the Mirror: A Freudian Psychoanalytic Study

Abstract

This study examines the complex manifestation of duality of self in Jill Castle, one of the main characters in Sidney Sheldon’s A Stranger in the Mirror, through the lens of Sigmund Freud’s psychoanalytic theory. The research aims to identify the manifestations of Jill’s divided personality, investigate the underlying factors contributing to its development, and analyze its psychological effects. Employing a qualitative descriptive method, the study analyzes textual evidence from the novel, including narration, dialogue, and character actions, based on Freud’s structural model of personality consisting of the id, ego, and superego. The findings reveal that Jill’s duality manifests through internal conflicts between instinctual desires, rational control, and moral expectations, appearing as self-observation, ambivalence, emotional instability, and defense mechanisms. Key factors driving this divided identity include psychological trauma, intense ambition, social pressure, and the pursuit of an idealized self-image. These factors intensify tensions among the id, ego, and superego, resulting in anxiety, identity instability, emotional fragmentation, and persistent distress. Ultimately, the study concludes that Jill Castle’s duality is rooted in unresolved psychological conflicts, demonstrating how Freud’s framework effectively explains character complexity. Furthermore, it highlights the representation of human psychological struggles in literary works and illustrates internal conflict’s impact on identity formation.