Book excerpt: Are there common mechanisms that apply across different therapies that might explain their effectiveness? Many psychologists, psychotherapists and counsellors, whether clinicians or researchers, now recognize that one such key mechanism involves the transformation of meaning in the process of therapy. The purpose of this book is to show how the transformation of meaning is related to therapeutic change. Change in therapy can and should occur at a number of levels for improvement to be maintained, whether in behavior therapy, cognitive therapy or psychoanalytic therapy. The leading scientists and practitioners who have contributed to this book approach therapy from very different perspectives, but they together help to fashion a common framework for understanding the role of meaning in therapeutic change.