This unique and important book breaks new ground in the theory and practice of person-centred psychotherapy by focusing on the issue of process. Process belongs to both client and counsellor. Worsley conceptualises process in relation to the core principles of the person-centred approach but also to the humanistic and phenomenological roots of person-centred therapy. Combining academic rigour with the wisdom of an experienced clinical practitioner, he opens up a more inclusive and integrative way of being with clients that nonetheless chimes with classical person-centred principles. The book features: * Activities and vivid case studies to illustrate and expand on the theoretical points being developed, allowing the reader to see easily how these might apply to practice. * Engagement with theoretical approaches such as transactional analysis and Gestalt, as well as discussion of philosophy, spirituality and psychopathology. * New discussion of the processes involved in mental illness, drawing on the work of Prouty and Warner to understand the client's world of experiencing. * New material on the plural self and configurations of the self.