What is Reiki?

The word Reiki is made of two Japanese words: 

Rei which means universal and is also a reference to the higher dimension of light and the soul.

Ki which means vital life force energy which interpenetrates and connects all.

Reiki is a form of healing based on the principle that the practitioner can channel energy into the subject by means of touch, to activate the natural healing processes of whatever needs to be healed.