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The Bhrigu Valli is the second chapter of the Taittiriya Upanishad , and it contains the famous five koshas (sheaths) explanation of human existence—from the physical Annamaya Kosha to the blissful Anandamaya Kosha . It is a foundational text for understanding Vedanta.

He realizes that the Mind controls the Prana. Thoughts, desires, and willpower direct the life force.