All the openitas, all vedanta, finally boils down to this. Teaching that yourself, you the real self, is brahman, the infinite. And this is expressed in the mahwaks, the profound sentences. Venm vilantes is beautifully taught in these profound sentences - tat tam asi that thou art.
Swami Sarvapriyananda teaches one of the shortest and most profound upanishads accompanied by Gaudapada's Karika. This lecture covers Mantra 1.