Gay affirmative psychotherapy is a form of psychotherapy for gay and lesbian clients which encourages them to accept their sexual orientation, and does not attempt to change them to heterosexual, or to eliminate or diminish same-sex desires and behaviors. The American Psychological Association (APA) offers guidelines and materials for gay affirmative psychotherapy. Affirmative psychotherapy states that homosexuality or bisexuality is not a mental illness. In fact, embracing and affirming gay identity can be a key component to recovery from other mental illnesses or substance abuse. There are a number of individuals for whom neither gay-affirmative therapy nor conversion therapy might be appropriate, however. Clients whose religious beliefs teach against homosexual behavior may require some other method of integration of their conflicting religious and sexual selves.