The word brahman means the absolute, for the ultimate reality. This very self is brahman. So i am atma braa. What does it mean? All this? Look at the same phrase again. Same phrase again. Everything indeed here is braHman.
Swami Sarvapriyananda teaches one of the shortest and most profound upanishads accompanied by Gaudapada's Karika. This lecture covers Mantra 2.