Whoever able to mentally observe the illusory universe as consciousness does not see diversity.+

Whoever able to mentally observe the illusory universe as consciousness does not see diversity.  Existence is nondual. Nonduality cannot be described by means of words, for all uses of language fail to express it. Nonduality is sought to be indicated mentally negation of duality (form, time and space). 

Whatever is seen, whether external or internal, whether by the ordinary persons or yogis, is unreal. 

Mentally reduce your body and the world in which you exist as consciousness by realizing you, your body and the world in which you exist are mere an illusion created out of consciousness. 

Mentally reduce the form, time and space as consciousness by realizing the form, time and space are mere an illusion created out of consciousness. 

Mentally reduce the three states as consciousness by realizing the three states are nothing but an illusion created out of consciousness. 

Mentally reduce the universe as consciousness by realizing the universe is nothing but an illusion created out of consciousness. 

Mentally reduce the experience of the birth, life, death and the world as consciousness by realizing the experience of the birth, life, death and world are mere an illusion created out of consciousness. 

When you mentally reduce everything as consciousness, then there is no second thing exists other than consciousness. 

Consciousness is second to none that is Advaita. Where there is unity in diversity, there is Advaita. : ~ Santthosh Kumaar