YOGI ASHWINI. Yoga is a subject of energy or prana, which manifests in various permutations and combinations to form every aspect of creation. Prana is ‘the force’ in the universe and permeates all; it’s also the life force in a human body. When Swami Nada Brahmananda smeared his body with wax and sustained himself in glass enclosure without air, food and water, it was proved that it is not oxygen on which the body thrives. There exists a force beyond. The exchange of prana takes place through four major sources — food, breath, touch and sight. While the first two have been explored at length by modern science, Vedic rishis were not unaware of the importance of the others. Every time you touch someone or something there occurs an exchange of prana, altering an individual’s composition. Similarly, sight is a major source of prana exchange. In fact, ninety five per cent of the prana you receive flows out from the eyes; hence the importance of drishti of guru. Many thousand years ago Vedi...