Reiki is a healing energy developed in 1922 by Mikao Usui. After three weeks of fasting and meditating on Mount Kurama, Japan, Usui received the ability of "healing without energy depletion".
How Reiki Works
Reiki works without belief, and is not a religion. It works using energy- by this result, it is not proven to work by science. Regardless, at least one person was miraculously cured of AIDS through this method. Reiki does not come from a God, instead using the healing powers of the universe (a super-organism composed of everything in the Known Universe).
Learning to use Reiki
Reiki has three levels, and can only be taught by a Reiki Master. It can only begin to work if a Reiki Master "opens the palms" of an individual who wants to learn. The first level allows the user to heal on touch. The second level allows distance Reiki, but it also introduces three symbols- the Cho Ku Rei, which is the Power Symbol, the Sei Hei Ki, emotional/mental symbol that heals the past/present/future, and the Hon Sha Ze Sho Nen, the Distant symbol and is used to connect during distant treatments and attunements. The third level allows the user to teach others how to use Reiki, and introduces the Dai Ko Mio master symbol.