Kundalini Sakti is the coiled-up, dormant, cosmic power that underlies all organic as well as inorganic matter. It is the primordial energy that lies at the basal Muladhara Chakra in a dormant, potential state. Kundalini Yoga is that Yoga which treats of Kundalini Sakti, the seven Chakras or centres of spiritual energy, the arousing of the sleeping Kundalini Sakti and its union with Lord Siva in Sahasrara Chakra at the crown of the head. The seven Chakras are pierced by the passing of Kundalini Sakti to the top of the head.