Sundaraanathar is transmigrated as Mulan and he reached Thiruvavuduthurai where he did penance under peepal tree and attained trance and cosmic bliss. Through his deep meditation, he went beyond galaxy and found the “Orion-constellation as God’s kingdom by astral-travel. He received many cosmic secrets and documented them “Sathasiva-aagamam or Thirumantira maalai” in Tamil, later named Tirumantiram. By his inner journey, Tirumular found his own experience that God resides within every human in the name of SIVA, Nanthi, Nathan, Aathma and the God’s particle.
It is believed by many enlightened sages, that after the compilation of Holy Tirumantiram, Tirumular reached Chidambaram and merged with dancing Siva there. But Tamil Sittha-mandalam is ever living cosmic consciousness in galaxy where Tirumular is the spiritual emperor.