Introduction to the Science of Yoga
The subtle layers of matter that first cover you—such as the mind, intelligence, and false ego—are like underclothes. Then, over the subtle material elements come the grosser material elements (going from the more subtle to the more gross), which cover you, the self, layer by layer. The layer of ether or sky covers over the mind, intelligence, and false ego; then the element air covers the element ether; the element fire then covers the element air; next the element water covers over the element fire; and finally the element earth covers over the element water. So in this way, you, the self, are covered by these eight primary subtle and gross layers of material energy. Thus, just as a man may have different layers of clothes over his naked body, the self also has eight layers of “clothes.”
Jagad Guru Chris Butler - Science of Identity Foundation
According to the science of yoga, you, the life particle are seated in the heart (but not inseparably—you can remove the physical heart, but you will not be removed with it). Your influence spreads throughout the body by means of this vast network of channels (nadis) that carry the life force to every cell of the body.
Jagad Guru Chris Butler - Science of Identity Foundation