[Nadis]
Channel through which the life force, or prana, flows in the energy body. There are 72,000 interconnecting the chakras. The three main nadis are named Ida, Pingala, and Sushumna.
▵ 72,000 nadis
Sadhguru: Within the spine, if you know its physical construction, you will know there are two holes on either side of the spine which are like conduit pipes for all the nerves to pass. This is the Ida and the Pingala, the left and the right channels.
In the Pranamayakosha or the energy body, there are 72,000 nadis. The 72,000 nadis spring from three basic nadis – the left, the right and the central – the Ida, Pingala, and Sushumna. The word “nadi” does not mean nerve. Nadis are pathways or channels of prana in the system. These 72,000 nadis don’t have a physical manifestation. In the sense, if you cut the body and look in, you will not find them. But as you become more aware, you will notice the energy is not moving at random, it is moving in established pathways. There are 72,000 different ways in which the energy or prana moves.Only when energies enter into Sushumna, life really begins.
The Ida and Pingala represent the basic duality in the existence. It is this duality which we traditionally personify as Shiva and Shakti. Or you can simply call it masculine and feminine, or it can be the logical and the intuitive aspect of you. It is based on this that life is created. Without these two dualities, life wouldn’t exist as it does right now. In the beginning, everything is primordial, there is no duality. But once creation happens, there is duality.
When I say masculine and feminine, I am not talking in terms of sex – about being male or female – but in terms of certain qualities in nature. Certain qualities in nature have been identified as masculine. Certain other qualities have been identified as feminine. You may be a man, but if your Ida is more pronounced, the feminine may be dominant in you. You may be a woman, but if your Pingala is more pronounced, the masculine may be dominant in you.
Bringing a balance between the Ida and Pingala will make you effective in the world, it will make you handle life aspects well. Most people live and die in Ida and Pingala; Sushumna, the central space, remains dormant. But Sushumna is the most significant aspect of human physiology. Only when energies enter into Sushumna, life really begins.
▵ The Three Fundamental Nadis – Ida, Pingala and Sushumna (Isha)