I hold no mortal form, little one. I can appear as so with little effort, but it is merely an illusion. Even as you believe you “feel” or “touch” the fur of my hide or the skin of my back it is my manipulation of your senses to believe that you feel my presence.
Perhaps in this way I am making myself solid. But not truly, for I may disappear or forsake my “appearance” at will. Therefore I appear to be changing shape; but I am always in one true form, and that is as a spirit.