The Complex Theory developed by Carl Gustav Jung, along with his insights on emotions, imagination and the creative power of the psyche have paved the way for current research on the effects of placebos and the interactions between the psyche and the immune system. Jung's concept of the mind-body relationship helps overcome misconceptions about root causes, guilt, and blame. It is important to note that the prevention and treatment of physical diseases are impossible without embracing the human psyche, as exemplified by numerous case studies from psychotherapeutic practice that serve to illustrate the content of this book.Renate Daniel, M.D., a specialist in psychiatry, psychotherapy and psychoanalysis and Director of Programs at the C.G. Jung Institute in Zürich, has been a psychotherapist in private practice for many years.She is the -author of Taking the Fear Out of the Night - Coping with Nightmares (2016) and The Self - Quest for Meaning in a Changing World (2020) as well as numerous published articles.