We are alive because life force is flowing through us. Life force flows within the physical body though pathways called chakras, meridians and nadis. It also flows around us in a field of energy called the aura. Life force nourishes the organs and cells of the body, supporting them in their vital functions. When this flow of life force is disrupted, it causes diminished function in one or more of the organs and tissues of the physical body.
The life force is responsive to thoughts and feelings. It becomes disrupted when we accept, either consciously or unconsciously, negative thoughts or feelings about ourselves. These negative thoughts and feelings attach themselves to the energy field and cause a disruption in the flow of life force. This diminishes the vital function of the organs and cells of the physical body.
Reiki heals by flowing through the affected parts of the energy field and charging them with positive energy. It raises the vibratory level of the energy field in and around the physical body where the negative thoughts and feelings are attached. This causes the negative energy to break apart and fall away. In so doing, Reiki clears, straightens and heals the energy pathways, thus allowing the life force to flow in a healthy and natural way.
How exactly does Reiki release tension and help the body heal? That question has yet to be answered. Although there is increasing research evidence documenting the effects of Reiki (such as lowered heart rate, blood pressure, and stress hormones; increased immune strength), we have only broad theories as to what causes these effects or the pathways through which the healing occurs.
The multileveled, rapid response to Reiki suggests a complex process that engages many body systems, simultaneously or in quick succession, shifting the body from domination by the "fight or flight" (stress) response to the relaxation response, and supporting the body's own healing mechanisms. (For more information about the relaxation response, see the Mind-Body Therapies section.) Some researchers theorize that Reiki's physical, mental, emotional, and spiritual healing effect is triggered on a subphysical level, perhaps in what science refers to as the biofield.
Because Reiki is guided by the God-consciousness, it can never do harm. It always knows what a person needs and will adjust itself to create the effect that is appropriate for them. One never need worry about whether to give Reiki or not. It is always helpful. In addition, because the practitioner does not direct the healing and does not decide what to work on, or what to heal, the practitioner is not in danger of taking on the karma of the client. Because the practitioner is not doing the healing, it is also much easier for the ego to stay out of the way and allow the presence of God to clearly shine through.