The pairs of opposites become active in our system when the Prana becomes restless. The restlessness of the Prana causes hunger and thirst. When the Prana is poised, there is a lessening of the feeling of the pairs of opposites. The Prana is calmed not only by the practice of Pranayama but also by Asana. When the body remains in a state of balance, the Prana too tends to be harmonious, even as the mind becomes tranquil when the sensations are harmonized.
Distracted sensations disharmonize the thoughts.
What the senses are to the mind, the body is to the Prana. As harmonized sensations create a harmonious set of thoughts, the harmonized body ushers harmony of the Prana. There is always a connection between the outer and the inner. Also, we are asked to face the East or the North in meditation, because of certain magnetic currents produced from these directions, due to sunrise and to the effect of the pole of the North. The place selected, too, should be free from distracting noise, from gnats and mosquitoes, etc., and from the chirping of birds, and the like.