The Upanishad says there are four aspects of the self: waker, dreamer, deep sleeper and the fourth. To the ignorant, the fourth is known as "the gold bangles," he writes. He explains how one consciousness can be nondual without a second reality. The universe is just an appearance on you, then what is the result of this enlightenment?
Swami Sarvapriyananda teaches one of the shortest and most profound upanishads accompanied by Gaudapada's Karika. This lecture covers Mantra 7 (Part 2).