Like the air we breathe, we typically can't see, touch or smell subtle energy, and yet it permeates everything-- it's the energy that makes things happen.
Subtle Energies may be defined as energies which are not measureable directly in the physical world, but rather can only be determined or measured by the effect they have upon the physical measurable world.
Subtle Energies has been rediscovered many times by many people. They are called “Life Force”, “Chi”, “Qi”, “Prana”, “Orgone”, “Torsion”, “Qigong”, “Pranic Healing”, and “Reiki”. (Claude Swanson, Ph.D. 2011)