The thesis of the article is that borderline psychopathology can be successfully treated by psychoanalytic therapy, and the principles of this treatment are outlined. Borderline psychopathology is defined as fusion in close relationships and reality adaptation in other situations. Thus, the major treatment issue is seen as the resolution of the transference psychosis. The article makes a distinction between overt and convert transference psychosis and demonstrates how both forms may be treated through interpretive means. A case treated in this manner is used to demonstrate the resolution of the transference psychosis with primary reliance on interpretation.