Brhadaranyaka Upanishad is the ancient and elementary or `Mukhya` part of Upanishad. It is related to the Shukla Yajur Veda. The Brhdaranyaka Upanishad is the secondary extraction of the Brahamana text. It is a commentary on Purush Sukta of the Vedas. It contains metaphors, symbolism and imagery for describing the nature of Reality. The thirteenth chapter of Part Five of Brhadaranyaka Upanishad describes about the Meditation on the Vital Breath i.e. the Prana. According to it one needs to meditate on the vital breath or Prana as the Uktha. The Uktha is life or the vital breath as it springs up (utthapayati). From him who is aware of this spring up a son who knows the vital breath and is firm. He gains the same nature and the same place with the Uktha.

As per the second verse one should meditate upon the vital breath as the Yajur. The Yajur is life as all the beings united with each other in the presence of the vital breath. The beings are all united for the sake of his superiority. Thus, one must meditate on the vital breath or Prana as the Yajur. Whoever is aware of this obtains the same nature and the same world with the Yajur.

The third verse states that one should meditate upon the vital breath as the Sama. The Sama is verily life. According to it one must meditate on the vital breath or Prana as the Sama. All the beings in this life meet together if the Saman (vital breath) is present. For him who thus knows meet all these beings together for the sake of his superiority. Whoever is aware of this obtains the same nature and the same place with the Sama

According to the fourth verse one should meditate upon the vital breath as the Kshatra. The vital breath is the Kshatra and is verily the life. The vital breath protects (trayate) the body from wounds (khanitoh). He who knows this attains the Kshatra i.e. the vital breath. He thus, obtains the same nature and the same place with the Kshattra.