The ability of psychotherapists to tolerate their own feelings in the clinical situation determines how their patients experience and tolerate their own intense--and often distressing--affect. Dr. Stanley J. Coen draws on his own struggles with the most difficult and challenging patients in his practice, and finds that affect intolerance, in both patient and therapist, can be mitigated and understood when therapists broaden their emotional range, enabling them to engage in emotionally richer interactions with the patient. The more of their own feelings and wishes that clinicians can take responsibility for, the more they can tolerate, contain, and eventually interpret what patients find emotionally unbearable. Dr. Coen describes, in detail, how he works with difficult patients, trying to engage them as deeply and fully as both they and he can tolerate. Coen focuses on the pragmatic use of affect tolerance in the clinical situation. Real change through treatment requires mobilization of intense feeling, including hate and love. Therapists, too, must contend with their own emotional inhibitions and stalemates, and he suggests collaborative ways to help them. He encourages therapists to broaden their perspectives, consult with colleagues, listen to others, write about their difficulties, work in peer supervision, and perhaps even go back to treatment themselves. He counsels them to study one another's difficult cases in a spirit of collegiality to learn what is most effective for patients. Coen shares his own experiences in troublesome clinical situations to help other therapists identify similar difficulties. He shows how all therapists can be prepared to catch their own vulnerabilities and discomforts with their patients' passions, and how they can then subject their feelings to self-scrutiny. By seeking to understand and confront their struggles with the feelings that their patients arouse, therapists can more fully help their patients work out their conflicts and to expand their emotional depth. A