Reiki is a form of energy healing developed by a Japanese Buddhist Priest, Dr. Mikao Usui, in the early 20th century. The word Reiki is made of two Japanese words - Rei which means "God's Wisdom or the Higher Power" and Ki which is "life force energy". Reiki works on the mental, physical, emotional, and spiritual levels. It uses spiritual energy to treat physical ailments without the use of pressure, massage, or manipulation.