Hanegraaff identified the second main healing current in the New Age movement as being holistic health. This emerged in the 1970s out of the free clinic movement of the 1960s, and has various connections with the Human Potential Movement. It emphasises the idea that the human individual is a holistic, interdependent relationship between mind, body, and spirit, and that healing is a process in which an individual becomes whole by integrating with the powers of the universe. A very wide array of methods are utilised within the holistic health movement, with some of the most common including acupuncture, reiki, biofeedback, chiropractic, yoga, applied kinesiology, homeopathy, aromatherapy, iridology, massage and other forms of bodywork, meditation and visualisation, nutritional therapy, psychic healing, herbal medicine, healing using crystals, metals, music, chromotherapy, and reincarnation therapy. Although the use of crystal healing has become a particularly prominent visual trope within the New Age, this practice was not common in esotericism prior to their adoption in the New Age milieu.