Just as Ananta (the serpent king) is the support of the whole earth, so too the support of all tantra and yoga is the serpent Kundalini. If the gum’s grace awakens Kundalini then she rises up, piercing all the lotuses (psychic centres) and the psycbic knots: vishnugranthi, brahmagranthi and rudragranthi. Then prana enters sushumna which is the highway of spiritual life and so the mind floats free of all supports and transcends the influence of time. Sushumna, shunyapadavi, brahmarandhra, mahapatha, shmasana, shambhavi and madhyamarga – all these are the different names of the same sushumna. To awaken the goddess Kundalini who is sleeping at the entrance of sushumna one should practise mudras.
Hatha Yoga Pradipika (3:1-5)