Reiki is a for the logical minded. Reiki is simple......lay your hands on a person and ask it to flow. We have all had experiences where we have felt energy. Walk into a home after a domestic dispute........everyone is smiling, but you can feel the negative energy from the dispute. After days of clouds, we feel less energy within us. Reiki expands our simple experiences but does not ask us to believe in any thing or person. Even works when you don't believe.
Many of us here use other forms of energy healing. These methods are not Reiki. They are their own methods. Some of us see spirits (good and bad), guides and angels. This is not Reiki. Although , I do feel that Reiki may make a person more open to seeing such things.
Blessings to you
blackearth