Without attaining which speech and mind turn backwards. He who can be attained only by knowledge, by whom ancient wisdom has been spread, who is unique and incomparable, omnipresent like the sky, extremely subtle, without colour, without action, the only true form, endowed with consciousness, form of bliss, endowed with monotony, auspicious, extremely peaceful and immortal, he is the supreme indestructible Brahman. He is you. Know him through knowledge.