At its root, Reiki is a Japanese healing modality that was brought to the West in 1937 by Takata Sensei and is now practiced by millions of people around the world. It is based on the belief that there is an "unseen life force" that flows through us and causes us to be alive. When that life force is low, we become susceptible to stress, depression, illness and dis-ease; when it is high, we are more capable of being happy and healthy. Reiki is the practice of amplifying and healing the life force energy that flows around and through every living creature in the universe (no big deal, right?).
In its depth, Reiki can be a portal for deepening our connection with the pulse of love that endlessly flows through the multiverse, and within all of us. This connection can be described as: love, intuition, ecstasy, nirvana. Dropping into the flow of that connection is arguably the most healing experience one can have, and - in my opinion - the highest expression of Reiki is the facilitation of this.