A Guru who speaks of knowing Brahman within the body is thinking only of his head or heart, i.e. of his body. He is hallucinating.+

Some Guru propagates that  God is alone is. There is nothing that exists. ”Just close your eyes” you can see God.  

Without knowing God is supposed to be in truth making such a statement is ignorance.  

Such half-baked knowledge is hearsay knowledge based on imagination, not Advaitic wisdom. Such half-baked dualistic knowledge gathered from different sources is not the Advaitic wisdom of Sage  Sankara. 

A Guru who speaks of knowing Brahman within the body is thinking only of his head or heart, i.e. of his body. He is hallucinating. 

Remember this: ~ 

First, know what this God is supposed to be in actuality. 

If the consciousness alone then what is the use of closing the eyes. One seeker must realize his body, his eyes, and the world in which he exists, as the consciousness. 

People think that there is God and that the jivas--Souls-like them from the second, other than them. There is no such duality at all.

Ignorance is the cause of the ‘I’ 

The duality is present in the form of the ‘I’.

The ‘I’ is present in the form of the mind.

The mind is present in the form of the universe.

The universe appears as waking or dream (duality) and disappears as deep sleep (nonduality).

The formless substance and witness of the appearance and disappearance of the ‘I’ is the invisible Soul. 

The Soul is present in the form of consciousness. Consciousness is the ultimate truth because the mind, which is present in the form of the universe, ceases to exist without consciousness. Thus,   consciousness is the ultimate truth or Brahman or God in truth. :~Santthosh Kumaar