Flame

  All substance has intelligence within it, but does not have free will as we do.
Elementals have some or a certain amount of free will, but are limited within a certain element, fire, air, water or earth, and usually to a certain particular area. Angels have free will but are of a particular quality.

Wood fire or fire of some other physical substance, is not fed evenly at a stationary pl...ace. But the fire moves where the material is. Wood or coal flame varies because the burning process is in stages and irregular.
A big search light holds its own form, and does not change. Even a gas flame on the store or in the yard for light, holds its own form, stays within a specific area. Because a gas flame is fed evenly, and burns likewise as long as there is no motion of air.
Turning on the light in a dark room just changes or replaces the darkness, but does not burn one’s flesh like a flame would.
All inner actions are in harmony and regular, so our reason tells us the flame too must be and not as the flame produced by physical material, wood, etc. Also the material consist of varied substances which causes various stages, intensity and action of the flame. Light intense enough can burn the flesh but not like flame which is more intense light.