Consider this book on Huna, The Secret Science Behind Miracles, by Max Freedom Long. (go through the link for a free download of this seminal work) sacred-texts.com
In the Huna tradition, as Long explains, the practitioner works with the forces of nature to prophecize, to create positive futures out of negative ones and to heal. But first, to experience natural magic, you must be "entranced with nature." This means that you acknowledge your ultimate connection to the Earth and to the cosmos. It is this allegiance to the natural world that sets the stage for the instructional phase to begin.
In this process of mastering the magical approach, Long suggests that three elements emerge to support the enterprise: There must be some form of consciousness directing the magical processes, some form of force used in exerting control and some form of substance, visible or invisible, through which the force can act.
In Huna, the consciousness is threefold: the subconscious, the conscious and the superconscious. And there are three voltages of vital force used by the three levels of consciousness: The low voltage body waves are used by the subconscious. The higher voltage brain waves are used by the conscious mind and the high voltage of vital force is used by the superconscious. There are also three forms of substance in which the three consciousnesses reside: the etheric body of the subconscious, which sticks permanently to whatever it senses, the etheric body of the conscious mind, which is a conductor of the middle voltage as used in the formation of the "will," and the etheric body of the superconscious spirit which resides in the light body at all times.