In *Croire et guérir*, author Régis Dericquebourg explores the powerful connection between belief and physical well‑being. Drawing on psychological research, personal anecdotes, and practical exercises, the book shows how mindset can influence healing processes. Readers are guided through techniques for cultivating positive expectations, managing stress, and fostering resilience in the face of illness. While rooted in scientific insight, the work remains accessible, offering actionable steps that anyone can incorporate into daily life to support both mental and bodily health.