Another theme is treatments for depression. Solomon discusses the two main types of treatments for depression, talking therapies and physical intervention. He describes in detail the two types of talking therapies, CBT and IBT, emphasizing that although each has been proven successful in treatment for depression, any treatment can only be as successful as the practitioner is competent. He emphasizes the extreme importance of choosing a therapist wisely. Not only must the therapist be competent, but if the patient does not like the therapist, the therapy cannot be successful. There are two types of physical treatments for depression, medicine and ECT.