According to ancient texts, the human body contains 72,000 nadis that channel prana to every cell. Some are wide and rushing; others are a mere trickle. When this system flows freely, we are vital and healthy; when it becomes weak or congested, we struggle with poor spiritual, mental and physical health. .

Three nadis are of particular interest to yogis. The sushumna (most gracious) nadi is the body's great river, running from the base of the spine to the crown of the head, passing through each of the seven chakras in its course. It is the channel through which kundalini (the latent serpent power) —and the higher spiritual consciousness it can fuel—rises up from its origin at the muladhara chakra to its true home at the \chakra at the crown chakra of the head. In subtle body terms, the sushumna nadi is the path to enlightenment.

The ida (comfort) and pingala (tawny) nadis spiral around the sushumna nadi like the double helix of our DNA, crossing each other at every chakra. If you visualize the caduceus, the symbol of modern medicine, you'll get a rough idea of the relationships among the ida, pingala, and sushumna nadis. Eventually, all three meet at the ajna (third eye) chakra, midway between the eyebrows.

The ida nadi begins and ends on the left side of sushumna.  Ida is regarded as the lunar nadi and is said to control all mental processes and the more feminine aspects of our personality. The color white is used to represent the subtle vibrational quality of ida. Pingala, the solar nadi, begins and ends to the right of sushumna. It is stimulating by nature, controls all vital somatic processes, and oversees the more masculine aspects of our personality. The vibrational quality of pingala is represented by the color red.

The interaction between ida and pingala corresponds to the internal dance between intuition and rationality, consciousness and vital power, and the right and  left brain  hemispheres.    In  everyday  life,  one  of  these  nadis is  always

                                                         
           Hindu idea of the nadis

dominant. Although this dominance alternates throughout the day, one nadi tends to be ascendant more often and for longer periods than the other. This results in personality, behavior, and health issues that can be called ida-like or pingala-like.

Ida-like individuals have lunar, or nurturing, qualities. They are full of potential, but unless they develop their pingala side may never manifest that potential in either worldly affairs or spiritual development.  Pingala-like individuals have solar qualities: type A personalities, lots of creativity, abundant vitality. But unless they develop their ida side, they may lack the quietude, introspection, and receptivity necessary to yield to the grace of spiritual awakening