The Action of Prana at the Level of the Subtle Body
The Yogis of ancient India took a somewhat different approach toward understanding the physical world than we have seen in the West. Western scientists have generally started from the most external physical forms and from there, systematically moved inward toward more and more subtle understanding. The Yogis quickly recognized that the physical form is the outer, grossest expression and could not possibly be the ultimate cause, and that therefore, something else must be building, creating and operating the outer world and all its forms. The Taittiriya Upanishad , indeed, started from the outer physical and moved toward the vital, mental knowledge and ultimately the spiritual levels of existence, with each one more subtle than the prior, and having a causative action on the former level. These Yogis, when they looked at the interaction between the subtle inner levels and the gross physical forms, developed a detailed understanding of the principles of action of the vital force, which th