The Skin of the Mythical Ox is the boundary that ensures the separation of reality and Myth, the Myth needs reality to exist and reality would be so empty without its myths.
The Bones keep the Myth from collapsing under the burden of reality, the Bones represent the structure, that shapes the volume, that is required to tell the story again and again.
The Soul houses deep inside the Mythical volume, it is the reality behind the Mythical story, it hardens the bones and thickens the skin.
