Quantum physics describes the universe as energy, with energy and matter interchangeable.
Psychology, Eastern therapy, and complementary medicine all have terms for life as energy. The aura can be viewed as an energy field surrounding the body, interacting through spiritual and psychological levels via structures called chakras. In other words the aura is an energy field that surrounds the physical body and is discernible to those of psychical sight.
The 7 main chakras have their origin in the physical body but they also exist in all the layers of the aura. The speed and vibration level of the energy is increased with each level. One can say that the human consciousness is manifested on 7 levels or in the 7 layers that is the aura.
How Reiki affects the aura
Before a Reiki attunement a persons aura might normally only extend a few decimeters outside the persons body. The attunement strengthens the aura and gives a permanent aura of about 2 -3 meters. At the same time the consciousness, the inner strength and the ability to intuitively see what needs to be changed in order to achieve maximum health is increased. Through the Reiki attunement and the strengthening of the aura you get the tool to take control over your life and development.
During a Reiki treatment not only the organs and the energy flow within the body are affect but also the different bodies of the aura are affected. When using distance healing or the mental/emotional symbol the aura seems to be more affected than the actual organs in the body.