Manduke claims that none of this is unknown to you. It's what you experience every day. The fourth aspect alone is real, he says. In the gold alone is is projected. Appears a necklace, a ring and a bracelet but all throughout, it's gold only. He adds: 'The knowers in the three states are false'
Swami Sarvapriyananda teaches one of the shortest and most profound upanishads accompanied by Gaudapada's Karika. This lecture covers Mantra 2.