Download or read book OM the Eternal Witness written by Swami Rama and published by Lotus Press. This book was released on 2007 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Upanishads are called shruti, revelations. Mandukya Upanishad, though the shortest of all Upanishads, is a revered, profound Upnaishad that teaches us about four states of consciousness: the waking, dreaming and sleeping states and Turiya, the fourth state, beyond the first three. In this Upanishad, there is a unique combination of psychology and profound philosophy, a clear exposition of the four states of consciousness.