In this book the author develops a novel, philosophically-psychopathologically founded theory of schizophrenia and its basic disorder. After the introduction with the presentation of the basic concept, the further study is divided into five chapters, each of which first gives a conceptual overview, then includes and analyzes clinical phenomena and research results in detail. The originality and creativity of the work essentially consists in using the terms mentioned as “passe-partout”, as it were, which allow the most diverse, often disparate phenomena and symptoms of schizophrenia to be viewed from an integrating point of view. The method used is phenomenological, descriptive, and interpretative, drawing on a wealth of empirical research results, but at the same time being re-viewed and reorganized in the subjective-perspective framework concept.