Although the Upanishads are by far the oldest outpourings of the mystical consciousness of man, they have remained unequalled by any rival, ancient or modern, in profundity, splendor, and purity. For countless generations of men, both inside and outside India. they have been the supreme sources of the spiritual life. Though historically the products of India, and of a particular age, they are in essence ageless and universal. They are rivers of life which never dry up." This volume of the Upanishads, contains ISa, Kena, Katha, Praina, Mundaka, Mandulcya, Svettlivatara. Aitareya, Taittiriya, and Kaushitaki. These are the major Upanishads and are regarded as the basis of the Vedanta philosophy, the outstanding contribution of the Hindu thinkers to the philosophical thought of the world. For the uninitiated the vast Vedic literature of the early Indo-Aryans is often a trackless tropical forest, full of lush underbrush, Weeds, thorns, and stately trees. Travelers in it often become dismayed, bewildered, and lost: yet if they courageously and patiently push on, they are rewarded by the discovery of blossoms of rare beauty and fragrance. The present volume contains some of these blossoms.