In the author’s view, each of us has boundary methods of reacting, but for some they’re hidden deep, while for others, stress is simply life itself—so these methods turn into a “boundary organization of personality.” Psychiatrists and psychoanalysts place “borderline” people between neurotics (conditionally mentally healthy people) and psychotics (mentally unhealthy people). The author’s task is to understand the qualitative features of the psyche structure of such people. The first part of the book is devoted to phenomenology: the analysis of conditions in which such psyche features form, the ways a “borderline” person deals with themselves, with others, and with the world. The second part describes the features of psychotherapeutic help for such clients. The book is addressed not only to psychotherapists, but also to a wide circle of readers.