The word Reiki is made of two Japanese words - Rei which means "God's Wisdom or the Higher Power"
and Ki( or CHI) which is "life force energy". So Reiki is actually "spiritually guided life force energy."
An amazingly simple technique to learn, the ability to use Reiki is not taught in the usual sense, but is transferred to the student during a Reiki class. This ability is passed on by resonant induction (Shaktipat) during an "attunement" given by a Reiki master and allows the student to tap into an unlimited supply of "life force energy" to improve one's health and enhance the quality of life.
Its use is not dependent on one's intellectual capacity or spiritual development and therefore is available to everyone. It has been successfully taught to thousands of people of all ages and backgrounds.
While Reiki is spiritual in nature, it is not a religion. It has no dogma, and there is nothing you must believe in order to learn and use Reiki. In fact, Reiki is not dependent on belief at all and will work whether you believe in it or not. Because Reiki comes from a Source of Infinite Intelligence, many people find that using Reiki puts them more in touch with the experience of their spirituality rather than having only an intellectual concept of it.
While Reiki, like Buddism, is not a religion, it is still important to live and act in a way that promotes harmony with others. Dr. Mikao Usui, the founder of the Reiki system of natural healing, recommended that one practice certain simple ethical ideals to promote peace and harmony, which are nearly universal across all cultures.
Distant Healing: In the second degree Reiki course, the student learns the use of a number of symbols, patterns and devices that are said to enhance the strength and distance over which Reiki can be exerted. This involves the use of such devices to form a quantum connection between the practitioner and the recipient, regardless of location and time, and then to send the Reiki energy. Another attunement is given, which is said to further increase the capacity for Reiki to flow through the student, as well as empowering the use of the symbols. Having completed the second level, the student can work without being physically present with the recipient - a practice known as "distant healing".