The divine power Kundalini lies dormant in the Muladhar Chakra. This power is coiled in three and half circles in the shape of a snake at the bottom of spine. A person remains in ignorance as long as it remains dormant in body. For him it is difficult to differentiate between Satya and Asatya (truth and untruth) and the true knowledge cannot be attained even with all the efforts. Therefore, it is said that as we can enter a gate immediately after unlocking its doors with key, exactly the same way when the Kundalini awakens, the ‘Braham dwara‘ (divine gate) can be opened, which imparts the knowledge of the truth and untruth. This mudra is to be practiced in some secluded place. Sit in Siddhasana, breathe in from both the nostrils and forcefully unite Prana Vayu with the Apana Vayu. Practice Aswini Mudra by contracting the rectum unless the air enters and brightens up in the Sushumna Nadi. In this way, by breathing and holding the breath, the snake shaped Kundalini wakes up and moves upwards. Without practicing the Shaktichalani mudra the Yoni mudra cannot be accomplished. Hence one should practice Shaktichalani mudra before the Yoni mudra. It can be achieved with regular practice and it does away with old age and one can attain control over the time of one’s death.