Kundalini is a Sanskrit word which literally means coiled. Kundalini (that is present in every being) is an absolute reflection of the infinite energy force (called cosmic energy or supreme contentiousness or pool of transcendence) that keeps the whole universe in order. Kundalini is the primordial energy, one of the primary components of man’s ‘subtle body’, which consists of 72,000 nadis (subtle energy channels), chakras (psychic centres), prana (subtle energy), and bindu (drops of essence). Nadis are astral tubes that carry pranic currents. They cannot be seen with the naked eye. Scientists have no idea about their existence. They are not the ordinary nerves, arteries and veins that science can see. Three Nadis are important. They are Ida, Pingala, and the Sushumna. Sushumna is the most important because Kundalini passes through this Nadi only. The first step in Kundalini Yoga is the purification of the Nadis. In fact entire process of Kundalini Yoga is about purification of 72,000 Nadis. For an average seeker (who does practice of about 45 minutes a day) it will take several decades to purify all 72,000 Nadis. When Sushumna is pure, then only will the Kundalini pass through it.