Susan T. Klein writes,

Bone is the deepest, densest tissue of the body and thus it conducts the greatest currents of energy. Bone is at the core of who we are and through it we know the essence of our being. When all else is gone, as a tree stripped bare in the season of winter, we can read its code; we can see its essential nature and know what was, through reading the bone. Bone does not yieldto gravity, but acts as a conductor, conducting energy, and connecting us to the system of nature, to the greater whole. It is through the bone that we stand as a ridgepole, “the tai chi”, between heaven and earth. When all else is gone, it is the bone that remains. It is bone, which holds our self-identity, our essential selves and our will power. Dropping away from the superficial and deceptive strength of the muscles we access strength from coordination; we access power connected to the knowledge of self-identity and the spirit of will available in the bone. Our power and identity come from working at our deepest physical level – the bone.