Jagrat Avastar: According to Vedanta, the first three aspects of the self, self has four aspects. The fourth aspect alone is real," he says. "It's like one screen which plays three movies or two movies and one sometimes just darkness" 'We think deep sleep is nothing much. It's just nothing,' Jagrat adds.
Swami Sarvapriyananda teaches one of the shortest and most profound upanishads accompanied by Gaudapada's Karika. This lecture covers Mantra 5-6.