The present study aimed to identify the manifestations of the psychotherapist that arise in the therapeutic relationship, identify the factors that influence the success or failure of therapy from the psychotherapist's perspective, and describe the coping strategies of psychotherapists dealing with BPD intervention that allows for effective intervention and generates significant change. The participants were 11 psychotherapists with 5 or more years of experience working with these patients. Semi-structured interviews were used, and the data were analyzed using content analysis. Four categories were identified: "Therapist's Manifestations," "Factors influencing therapy success or failure," "Therapist's coping strategies," and "The purpose of therapy." It is highlighted that the interaction with the patient can lead to a variety of reactions in the professional, which should be employed as...