The techniques of psychotherapy are often given undue emphasis, slighting the importance of the psychotherapist. Research suggests that the same techniques are differently effective when used by equally trained and supervised therapists. Not only are some therapists more effective, irrespective of the type of therapy they practice, but some, because of their personal qualities, may actually harm those with whom they work. This research reflects the vast importance of the personality of the therapist, evoking the question of how a therapist may develop personhood. Aimed at training as well as practicing psychotherapists - social workers, counselors, psychologists, and psychiatrists - this scholarly exploration of personhood includes various models for classifying the types of psychotherapy and the place of personhood in this context, as well as a review of existing theory and research literature on specific personal therapist variables as they relate to therapy outcome. The role of traditional spirituality in the development of personhood is given particular emphasis.