1: What is Thinking?

This opening chapter introduces the central question of the book: what does it mean to think, and why does it matter for health? Thinking is something we do constantly, yet we rarely stop to notice how we do it or how it shapes our well-being. The chapter begins by inviting readers to slow down and observe their own patterns of thought, showing how reflection on thinking can deepen understanding of both mind and body. It traces connections between thought and health, explaining how mental states influence physical well-being and how a narrow focus on disease has limited our understanding of how positive thinking and emotion can promote flourishing. The discussion highlights that thinking about health is never purely biological but also ethical, involving decisions about what we value and how we choose to live.