This from wikipedia.
Perhaps one of the most notable factors of this sage is the claim that he supposedly attained a divinization of the physical body. He attained a total of 3 transformations. His first transformation was the transformation of his normal human body into the Perfect Body, between the supposed attributes of this body are total invulnerability to everything thus rendering him effectively immortal and impervious to any kind of damage as well as having the attributes of being omnipotent, omnipresent and omniscient this body is apparently made of Divine Light.
Beyond this state there was a subsequent transformation by which the Perfect Body transformed further into the Grace Body possessing the following attributes: This body have automatically a young appearance like that of a kid, can be seen but cant be touched, and has complete and absolute dominion over all the Siddhis.
Even beyond he State of the Grace Body supposedly there was a third and final transformation in which the Grace Body was transformed into the Bliss Body. This body is the body of the Supreme Godhead and is automatically omnipresent but cant be perceived by anyone.
By achieving this Ramalinga demonstrated that the ultimate states of spirituality can in fact be attained in this world with the physical body and death is not a necessity to experience the ultimate spiritual experience.http://en.wikipedia.org/wiki/Ramalinga_Swamigal