The prime Upanishad among the many Upanishads written in ancient India, known very widely for its profound philosophical statements. Brhadaranyaka belongs to the Shatapatha Brahmana and is ascribed to Sage Yajnavalkya. Its name is literally translated as "great forest-book". It includes three sections, namely, Madhu Kanda, Muni Kanda (or Yajnavalkya Kanda) and Khila Kanda. The Madhu Kanda explains the teachings of the basic identity of the individual and the Universal Self. Muni Kanda includes the conversations between the sage Yajnavalkya, the great Upanishad philosopher, and his wife, Maitreyi. Various methods of worship and meditation are dealt in the Khila Kanda. The doctrine of “Neti, Neti” (“not this, not this”) is found in this Upanishad which can be intepreted as the negation of all conceptions of self, which is similar to the Anatta doctrine of Buddhism. The Upanishads (उपनिषद्, Upanişad) are part of the Hindu Shruti scriptures which primarily discuss meditation and philosophy and are seen as religious instructions by most schools of Hinduism. ... Shatapatha Brahmana (Brahmana of one-hundred paths) is one of the prose texts describing the Vedic ritual. ... Sage Yajnavalkya of Mithila (perhaps 1800 BC) advanced a 95-year cycle to synchronize the motions of the sun and the moon. ... The Buddhist doctrine of Anatta (PÄli) or AnÄtman (Sanskrit) specifies the absence of a supposedly permanent and unchanging self or soul (Ätman). ... Statues of Buddha such as this, the Tian Tan Buddha statue in Hong Kong, remind followers to practice right living. ...
His deep philosophical teachings in the BrhadaranyakaUpanishad, and the apophatic teaching of 'neti neti' etc. is found to be startlingly similar to the Buddhist Anatta doctrine.
Wisdom of Yajnavalkya revealed to a greater extent in BrhadaranyakaUpanishad where he imparts his teachings to his wife maitreyi and King janaka.
His precepts as contained in the Upanishads (The BrhadaranyakaUpanishad) stand foremost as the crest-jewel of the highest teachings on knowledge of Brahman.