The third part of the mantra, starting from Akart ma pratya saaram. This is what we shall see today. Here it takes a turn towards the positive. It's not trying to indicate what the turium is,. The so-called fourth, what your real nature is. Shankaracharya: "If it could be said, it would have been said directly, but it can't be said"
Swami Sarvapriyananda teaches one of the shortest and most profound upanishads accompanied by Gaudapada's Karika. This lecture covers Mantra 7 (Part 2).