Drawing a comparison between diagnosis in classical medicine and osteopathy, Dr. Croibier explains that the osteopath focuses on restoring the conditions of good health rather than simply addressing the consequences of disease. Enhanced with more than 175 full-color instructional photos and illustrations, the book describes the manual hands-on assessments and general evaluations that lead to a diagnosis. Manual assessments include objective observation, diagnostic touch, palpation of the affected areas of the body, visualization, and "listening" (a hand placed on a specific part of the body to determine tissue functionality). Based on Dr. Croibier's recommendations, the manual therapist also performs a patient intake and interview; general evaluation that analyzes the patient's symptoms and general state; examination of posture and equilibrium; and observation of individual characteristics, such as constitution, temperament, and body type.