If you skew the endocrine system, you lose the pathways to self. When endocrine patterns change, it alters the way you think and feel. One shift in the pattern tends to trip another.

Hilary Mantel’s quote delves into the intricate relationship between the endocrine system and a person’s sense of self. By stating that “If you skew the endocrine system, you lose the pathways to self,” she highlights how profoundly hormonal balance influences our identity, thoughts, and emotions. The endocrine system, responsible for regulating hormones, is foundational to mental clarity, emotional stability, and even one’s perception of who they are.

Mantel emphasizes that when endocrine patterns change, it doesn’t just affect the body—it transforms the way you think and feel. This suggests that physiological shifts can deeply alter psychological experiences. Her insight reflects a nuanced understanding that biology and mind are not separate realms, but interconnected forces. A slight imbalance in hormones—whether due to stress, illness, or medication—can cascade into broader changes in mood, cognition, and behavior.

She also points out that one shift in the system often trips another, underlining the delicate and interlinked nature of bodily systems. This domino effect illustrates how disruptions in hormonal cycles can rapidly escalate, impacting not just individual well-being but the continuity of one’s self-awareness. The phrase “pathways to self” evokes the idea that our internal chemical rhythms are essential routes to understanding and maintaining personal identity.

The origin of this quote is likely rooted in Mantel’s personal experiences with long-term health challenges, including endometriosis and the side effects of various medical treatments. Her work often explores the intersection of body and mind, and this quote reflects her keen awareness of how physiological realities can shape narrative, memory, and character—both in fiction and in life.