This is the first of the three discourses on non-dual advaita philosophy, and is explained by Swami Tattwamayananda, the ex-Acharya of Belur Math, Kolkata. Swamiji is currently attached to the the Vedanta Society of Northern California, founded in 1900 by Swami Vivekananda. Swami Tattwamayananda is a monk of the Ramakrishna Order and a former Acharya (instructor) at the Order’s monastic Training Center at Belur Math, Kolkata, India. He received traditional training as a scholar in Sanskrit, in Vedic studies and in Indian philosophy with a special focus on Advaita Vedanta and with an additional emphasis on the study of Ramakrishna – Vivekananda literature. He was assigned to various centers of the Ramakrishna Order in India as editor, publisher and teacher. In addition to Sanskrit and Indian philosophy, he has also taught Hindu, Vedantic and Buddhist scriptures. He has often been invited to attend international conferences dealing with traditional Vedic Scriptures. In January, 2012, he was asked by the Order to come to the United States. Currently, he is serving as the Minister-in-charge of the Vedanta Society of Northern California, San Francisco.