Introduction
The Upanishad belongs to SAma Veda and is important because it is one of the ten Upanishads on which ShankarAchArya has written commentaries. Brahm Sutra discusses many mantrAs of this Upanishad. Study of Brahm Sutra necessarily requires prior study of this Upanishad. It has 8 chapters with 627 mantrAs. The first five chapters discuss Vedic meditations. The outcome of Brahm-upasana, regarded as the highest meditation is krama-mukti. The meditator reaches Brahmaloka and finally merges in Brahman. It is nothing compared to realization of Brahman in this life.