The book "Fundamental Work 01. Fundamental Questions in Practice" by C. G. Jung offers a comprehensive exploration of fundamental aspects of practical psychotherapy. It addresses central themes such as the goals of psychotherapy, its relationship to worldviews, and the challenges that arise in modern practice. The content is both theoretically grounded and practically applicable, making it a valuable resource for professionals in psychotherapy. The various chapters illuminate, among other things, the therapeutic value of catharsis, dream analysis, and the psychology of dreams. Jung also discusses complex theory and schizophrenia, making the book an important contribution to psychological literature.