Mentalizing--the capacity to understand others' and one's own behavior in terms of mental states-is a defining human social and psychological achievement. It involves a complex and demanding spectrum of capacities that are susceptible to different strengths, weakness, and failings; personality disorders are often associated with severe and consistent mentalizing difficulties (Fonagy & Bateman, 2008). In this article, we will argue for the role of mentalizing in the therapeutic relationship, suggesting that although mentalization-based treatment may be a specific and particular form of practice, the "mentalizing therapist" is a universal constituent of effective psychotherapeutic interventions.