Idâ and Pingalâ play along the curved wall of the cord in which is Sushumnâ. They are semi-material, positive and negative, sun and moon, and start into action the free and spiritual current of Sushumnâ. They have distinct paths of their own, otherwise they would radiate all over the body. By concentration on Idâ and Pingalâ is generated the “sacred fire.”
Another name for Shiva's Vînâ (sympathetic system) is Kâlî's Vînâ.
The sympathetic cords and Idâ and Pingalâ start from a sacred spot above the medulla oblongata, called Triveni. This is one of the sacred centres, another of which is Brahmarandra, which is, if you like, the grey matter of the brain. It is also the anterior fontanelle in the new-born child.
The spinal column is called Brahmadanda, the stick of Brahmâ. This is again symbolized by the bamboo rod carried by Ascetics. The Yogîs on the other sides of the Himâlayas, who assemble regularly at Lake Mânsarovara, carry a triple knotted bamboo stick, and are called Tridandins. This has the same signification as the Brâhmanical cord, which has many other meanings besides the three vital airs: e.g., it symbolizes the three initiations of a Brâhman, taking place: (a) at birth, when he receives his mystery name from the family Astrologer, who is supposed to have received it from the Devas (he is also thus said to be initiated by the Devas); a Hindu will sooner die than reveal this name; (b) at seven, when he receives the cord; and (c) at eleven or twelve, when he is initiated into his caste.
Q. If it is right to study the body and its organs, with their correspondences, will you give the main outline of these in connection with the Nâdîs and with the diagram of the orifices.
A. The Spleen corresponds to the Linga Sharîra
The Liver to Kâma
The Heart to Prâna
The Corpora-quadrigemina to Kâma-Manas
The Pituitary body to Manas-Antahkarana