This opens to us the door to almost unlimited power. Suppose, for instance, a man understood the Prana perfectly, and could control it, what power on earth would not be his? He would be able to move the sun and stars out of their places, to control everything in the universe, from the atoms to the biggest suns, because he would control the Prana. This is the end and aim of Pranayama. When the Yogi becomes perfect, there will be nothing in nature not under his control. If he orders the gods or the souls of the departed to come, they will come at his bidding. All the forces of nature will obey him as slaves. When the ignorant see these powers of the Yogi, they call them the miracles. One peculiarity of the Hindu mind is that it always inquires for the last possible generalisation, leaving the details to be worked out afterwards. The question is raised in the Vedas, "What is that, knowing which, we shall know everything?" Thus, all books, and all philosophies that have been written, have been only to prove that by knowing which everything is known. If a man wants to know this universe bit by bit he must know every individual grain of sand, which means infinite time; he cannot know all of them. Then how can knowledge be? How is it possible for a man to be all-knowing through particulars? The Yogis say that behind this particular manifestation there is a generalisation.