Sage Sri, Sankara declared: - The world is unreal. He never said body is unreal.

Sage Sri, Sankara declared: - The world is unreal. He never said body is unreal. He would have said only birth and death is unreal, he did not say that, he said the world is unreal. He meant the world including the body, because the body and world appear together and disappear together (waking or dream). Then we have to conclude, what remain without the body and the world as reality. 

How can the birth, karma, death, rebirth, and reincarnation, which take place in unreal world [waking/dream], can be true. The one, which is aware of the birth, life death, rebirth and reincarnation [illusion/unreal], is formless reality, which is the true self/true identity. The formless self is your true identity, which is birthless and deathless but it is the witness of the birth, life and death and rebirth (illusion/unreal).

 
On the standpoint of true identity the birth, life, death, rebirth and reincarnation theory is part of the illusion/unreal. The body cannot reincarnate, the body and the world are created out of the same formless stuff. Until one views and judges on the base of flesh, bone and blood [five elements], he will not be able to grasp the non-dual truth. Thus, one must know on what standpoint, we are not born and we do not die thoroughly, just by hearsay views, it will not lead anyone to the non-dual destination. – FORMLESS PATH