It is useful to discuss personal matters in therapy for a variety of reasons. Certain types of disclosures are almost universally recognized as necessary in the early stages of therapy, such as an explanation of the therapeutic approach to be used and particular characteristics of the therapist. Disclosure with another individual facilitates a closeness in that relationship and is strongly believed to lead to a deeper understanding of the self. One will often see their disclosure in a more positive perspective if it is shared with someone else. It is thought that disclosing the details of a traumatic experience can greatly help with the organization of related thoughts, and the process of retelling is itself a method of healing. An understanding between therapist and client is achieved when the client can share their perceptions without feeling threatened by judgments or unwanted advice. Further, expressing emotions lessens the toll of the autonomic nervous system and has been shown in several studies to improve overall physical health in this way. A disclosing therapist invites their client to compare cognitive perceptions and perhaps realize their own distortions.