The Two Pieces of wood that ignite the fire can be thought of as the physical body and the sacred syllable oum. The act of rubbing the two together is the act of meditation. When this is done, the radiant Brahman is realized. Clarified butter is always present in milk, even if it cannot be seen. Like that, the Brahman is everywhere and can be realised through truth and meditation. He who realizes the Brahman, realize him in one’s own atman. The Brahman is like oil in sesamum seeds, water in the ground, and clarified butter in milk.