UpaniÈads are an authoritative compendium of Indian metaphysics. They represent the earnest efforts of profound thinkers of early India to solve the problems of origin, nature, and destiny of man and the universe, more technically the meaning and value of knowing and being. They are replete with sublime conceptions and with intuitions of universal truth. These UpaniÈads sets forth two opposing theories: one of mundane life and the other relating to a life that is in search of the Supreme Reality and man’s ultimate aim. Though, traditionally, 108 UpaniÈads are well known and subject to various studies, there are around 200 UpaniÈads in toto. Of them, this volume contains the translation and interpretation of thirteen principal UpaniÈads such as B¦hadÀraõyaka, ChÀndogya, TaittirÁya, Aitareya, KauÈÁtaki, Kena, KaÇha, ±œa, Muõçaka, Praœna, MÀõçÂkya, ŒvetÀœvatara and MaitrÁ along with the outline of the philosophical wisdom inherent in these UpaniÈads. It also features the recurrent and parallel passages in these principal UpaniÈads and the BhagavadgÁtÀ.