The Subtle Planes Are Causative to the Exte al Physical Reality
In the Taittiriya Upanishad, a seeker undertakes a discipline to discover the truth of existence. He first lands upon the idea thta the material existence is the truth, as it is the basis and foundation of his existence. As he continues his concentration, however, he begins to realize that the exte al physical reality is actually caused by and developed through the action of ever-more-subtle powers of existence.