The therapeutic process involves many different types of affective phenomena. No single therapeutic perspective has been able to encompass within its own theoretical framework all the ways in which emotion plays a role in therapeutic change. A comprehensive, constructive theory of emotion helps transcend the differences in the therapeutic schools by viewing emotion as a complex synthesis of expressive motor, schematic, and conceptual information that provides organisms with information about their responses to situations that helps them orient adaptively in the environment. In addition to improved theory, increased precision in the assessment of affective functioning in therapy, as well as greater specification of different emotional change processes and means of facilitating these, will allow the role of emotion in change to be studied more effectively. A number of different change processes involving emotion are discussed, as well as principles of emotionally focused intervention that help access emotion and promote emotional restructuring.