Serpent Adishesha, is the one, who holds the shade in the head of Vishnu . While these is a symbolic picture, where Vishnu represents our heart of pure love .Adishesha also represents the Awareness, which holds the heart of pure love.
In ancient time , Adishesha reincarnated as Sage Patanjali, to deliver these subtle knowledge of awareness to the people to cure there physical and mental ailments . It was a group of sages , who went to Vishnu and prayed to end the human suffering .
“My lord there are many scriptures many streams of knowledge of Vedas and Upanishads , Ayurvedas and there is an existent of Guru Parampara after the Adi Guru – Dakshinamurty has given his knowledge to the Saptarishis . However these are only accessible to the qualified and able disciple, who are remains in the presence of the Guru . The masses are still suffering , as they could not access it , or understand and apply it in their lives “.
Lord Vishnu looked at Adishesha and he asked him to reincarnate in the world , who is the personified form of Awareness. But to end the human suffering he has to bear the earth . The serpent Adisesha worshipped the Lord of the Red Hill the Arunachala Shiva , and acquired, by Siva’s Grace, the strength to bear the earth.
And then Patanjali wrote the Yoga Sutras . The School of Yoga was there much before and there are many deeper texts on it . But it was Patanjali who brought all these literature scattered in different places , into one solid doctrine which can be practised by everybody. That’s why even the knowledge of Yoga was given by the Adi Yogi ( Shiva ) while facing southwards [ that’s why he is known as Dakshinamurty] , much before then Patanjali , Maharishi Patanjali is still considered the father of Yoga.
There is a presence of knowledge at that point . who is considered as the father of Yoga and creator of the famous Asthanga marga .
The serpent Adisesha worshipped the Lord of the Red Hill and acquired, by Siva’s Grace, the strength to bear the earth.