'He who dwells in the ether (akasa), and within the ether, whom the ether does not know, whose body the ether is, and who pulls (rules) the ether within, he is thy Self, the puller (ruler) within, the immortal.'

In plain words: The inner ruler lives within open space (akasha, the empty space everything sits in) and guides it from inside, though space does not know it. It is your own deathless Self.