It is shown in this book that dreams and the symptoms of "primary mental disorders" are automatic responses that seek to protect physical and especially mental health on the basis of the cerebral lateralization of functions. This understanding of the symptoms and dreams and the therapist's consequent cooperation with the patient's unconscious makes very fast and effective psychotherapy possible, which is self-applicable in many disorders such as migraine and tension headaches, for example. Many other psychological phenomena besides mental disorders and dreams become understandable in this perspective.