Deeper self -search reveals the fact that, mind is not limited to the physical entity but the Mind is this whole Universe

The consciousness is cause for existence of the body and world and it itself is uncaused. Consciousness is the innermost self. In self- awareness the body and world cease to exist as reality. The whole universe is mental; it is in mind; universe is mere mirage created out of consciousness!" the ‘I’ is not confined to the body; but ‘I is the mind and mind is the whole universe and universe appears as waking or dream and disappears as deep sleep.

Deeper self -search reveals the fact that, mind is not limited to the physical entity but  the Mind is this whole Universe.  Thus thinking the mind is within the body is cause of the ignorance. And ignorance is cause of experiencing the illusion as reality. Illusion is cause of duality.  Duality is cause of sedation. Within the duality one thinks he is and individual separate from the world and world existed prior to him and he is born in it afterwards. Until this conviction is there one remains in ignorance of his true existence, which beyond form, time and space.  

"Verily nothing is mine" If you have universe in the mind, in Brahman; what is there to say that this is mine when there is nothing beside consciousness, which is ultimate truth or Brahman; when whatever is, is myself. c.f. deep sleep illustration, when everything is converted into conciousness.

All "spiritual" planes are really mental: those who regard them as different or higher are deceiving themselves.

The dream becomes unreal when the waking takes place; similarly the waking becomes unreal when the wisdom dawns.  Therefore everything has to be grasped mentally, not argued on the intellectual point of view, which is limited to the false physical entity(ego or waking entity)  within the false experience.

The unreal (mind or universe) is created out of real (soul or consciousness) , and when one views and judges on the standpoint unreal (ego or waking entity) then there is duality. When one is able to view and judge on the standpoint of real [soul or consciousness] then there is only non -duality.  Therefore, when the wisdom dawns then there is neither duality, nor non duality, only reality.

All these confusion will go on, until man thinks, he is an individual and apart from the world, and the world existed prior to him and he is born in it afterwards. Therefore, it is necessary to know the fact that,  the true self is not ego, but the formless   soul.  If the formless osul is the true self then  one has to view and judge the three states on the base of the formless soul inoder to unfold the mystery of the mind or universe.

Viewing and judging the three states  on the standpoint of the physical self (ego) is erroneous,  because the waking entity(ego) is not the self.   One has to view and judge on the standpoint of  the formless soul (consciousness) to realize the fact that, the world along with man is a mere illusion. The illusion (universe or mind or waking) is created out of consciousness. Thus consciousness is Brahman or ultimate reality. Thus no second thing exists other than consciousness.

Deeper  self-search reveals the fact that, the mind, which is in the form of universe is an appearance.  Only on the standpoint of physical entity (waking entity or  ego),  the universe is reality.  But on the base of the formless  soul, which is in the form of consciousness the universe is unreal. The formless witness or consciousness itself is the substance of the universe.   The man perceives the world within the mind or waking. Therefore, man, ego, world together is mind. 

The mind is in the form of universe. the universe appears  as waking or dream(duality) and disappears as deep sleep(non-duality). The  formless soul or consciousness is the innermost self and witness of the mind or universe. The universe appears as waking or dream disappears as deep sleep.   The waking or dreams are dualistic appearance and deep sleep is non-dualistic. The one which witnesses the three states is formless, apart and eternal.  The mind or universe is mere mirage created out of consciousness.  on the standpoint consciousness which is the  formless substance and witness of the three states the three states are not real.  

The formless substance witness is soul or consciousness, which is in the form of consciousness. Therefore nothing exist other than consciousness. The objective awareness is mere illusion created out of consciousness, the innermost self. Therefore, consciousness itself is ultimate truth or Brahman, because there is no second thing exit other than consciousness.

Consciousness is ultimate truth. Consciousness alone is real. Universe is unreal. Everything other than consciousness is unreal.

The waking objects fall into two categories- practical life within the practical world waking objects become unreal on the dawn of non-dual wisdom. The egocentric knowledge within the practical life is not Self-knowledge or Brahma Gnana or Atma Gnana.   Self-knowledge or Brahma Gnana or Atma Gnana means the means the knowledge of the soul, which is the innermost self. The soul is in the form of consciousness. Therefore, formless consciousness is the innermost self.  Thus basing the reason on the soul is soul-centric inquiry. 

Waking objects exist even before they are known. They are product of ignorance.  Thus they are covered by ignorance. When this ignorance is removed through wisdom than the duality ceases. The ignorance covers the pure consciousness, which is the innermost self, limited by the object. The object itself is not self-luminous and so no covering is necessary for it to remain unknown. The consciousness limited by the object is self-luminous and so it remains unknown only because of the covering of ignorance. When the covering is removed through wisdom, the consciousness underlying the object illumines the object and then the object is become conscious of.