The Brihadaranayaka Upanishad belongs to Shukla yajurveda. It is considered as the fourteen Kanda of the Shatapatha Brahmana. The Brihadaranyaka Upanishad has two recensions, i.e. Madhyandina and Kanva and divided into six adhyayas (chapters). It is identified as one of the principal Upanishads as well oldest Upanishad in Vedic literary heritage.
The first chapter describes about Vedic theories about creation of the universe, while the second chapter enumerates theory of dreams, the third chapter proclaim the nature of Reality, Soul and perfection, the fourth chapter describes theory of phenomenal manifestation and fifth and sixth chapters are considered as Khilakandas.
As far as the Vedic Philosophy, it ranks as a major spiritual text to understand the secret doctrine of the self and the ultimate reality.