The idea of God exists only in Waking experience along with the idea person and his experience of the world.

The Seeker has to verify the fact that: How he is able to sees various objects, scenes and persons during dreams? If the dream is experienced without the physical body then what is it that experiences the dream?  Therefore, there must be an invisible experiencer [witness] of the dream world. This experiencer is the same experiencer that is experiencing this awakens state. Therefore the awaken state and dream both are experienced by one and only invisible experiencer[witness] of which the seeker is not aware of, since he considers the physical body is the experiencer. 

The gross dream and Waking experiences are merged into the mental experience in the sense that when it is analyzed, it is found to exist inseparably in and as the mind alone. All "spiritual" planes are really mental: those who regard them as different or higher are deceiving themselves.

The idea of individualized  God exists only in Waking experience along with the idea person and his experience of the world.  In reality there is  no individualized God or man and his experience of the world because in reality the form,time and space are one in essence. Hence there is no separation only oneness.

 The Waking experience appears and disappears.  When there is Waking experience the dream is mere illusion. When there is dream there is no trace of Waking experience.  When there is neither that is dream nor Waking it is called deep sleep. Therefore, it is necessary to investigate what is aware of these three states is, when the Waking identity does not exist in dream and dream identity becomes false hood when Waking takes place and there is no identity during the deep sleep.

One comes to firm conclusion and conviction only  after deeper self-search.  The witness of the three states is neither the waking entity nor the dream entity but  the formless Soul or consciousness,  the innermost self. the soul or consciousness becomes unaware of its true nature   in the dream or Waking but  it  remains in its true nature during deep sleep.  Thus it becomes evident that the three states are dependent on the formless  witness(soul or consciousness)  for their existence. The consciousness  is not only witness of the three states but also the substance of the three states.  In reality the substance and witness of the three states are one in essence.

Therefore, the invisible Witness is the knower of the three states Without the witness there cannot be the knowledge of dream and deep sleep in Waking experience.

Thus the seeker has to consider the formless  witness of the three states as the innermost self and  proceed deeper in his spiritual pursuit. When seeker considers the  formless soul or consciousness  which is the witness of the three states than  on the standpoint of the soul or consciousness, the innermost self ,  the three states are mere illusion. 

All the claims that God is doing this or that or has such and such qualities, are made within the illusory Waking experience. He ,  God and  his experience of the  world are reality  only during the Waking experience. The Waking experience disappears as  formless  consciousness  in deep sleep. that is mind(universe) becomes soul(consciousness) in deep sleep.   That is form(waking)  becomes formless(spirit)  in deep sleep. 

The Waking also is mere mental experience similar to dream which one considers as false hood when Waking takes place. Same way Waking also is falsehood when wisdom dawns.

On the base of formless soul or consciousness, the innermost self, whatever seen, known, believed, experienced as real as a person during Waking is bound to be false. Because all the three states are mere illusion created out of consciousness. in reality the three states are one in essence.

The concept of god, heaven, hell, sin, evil, religion ,scriptures, saint and sages  are reality  till one hold the waking experience as reality.  When one has  the firm conviction  that self is not the waking entity but the self is the formless soul or consciousness   and learns to view and judge the three states on the standpoint of soul or consciousness  as self than  all the three states are mere illusion.

Religion and its idea of  individualized God are mere opinion or imagination based on the ‘waking entity or ego ’ as self which is the false  entity within the false experience. 

Self-knowledge or Atma Gnana or Brahma Gnana cannot be attained by one who is without strength or earnestness or without the receptiveness and courage to accept the truth and reject the untruth. If a serious seeker strives sincerely by means of inquiry, analysis and soul-centric reasoning, he will be able to realize it.

It is your sincerity and earnestness in your spiritual pursuit, the knowledge started revealing on its own.  Anyone who has humility and patience and is sincere and ready to drop their accumulated dross and receptive to accept the truth will enter non-dual Self-Awareness when the conviction becomes firm. 

The Upanishads affirm the eternal, divine nature of the Atman-Self and Atman is Brahman. This perspective is essential to perfect understanding assimilation of ultimate truth.  

Orthodoxy propagate the idea of both the personal and impersonal aspects of Gods are based on imagination on the base of the false self (waking entity or ego), within the false experience (waking). Since the whole universe and its contents are created out of single stuff and the whole universe is mere illusion created out of that single stuff, which is consciousness, than where is the scope for any second thing to exist.  Thus the soul, which is present as consciousness is ultimate truth or Brahman. Therefore, other than consciousness all else is mere illusion. There no God other than consciousness.     

The seekers main aim is to investigate both dual and non-dual experiences to find and define the underlying truth in everything, thereby realizing what the ultimate truth is.  Because of so many beliefs propagated by belief system, people think seekers of truth are   atheists because they do not accept the belief blindly. The  Seekers of truth believe the believers  and atheists both are believers because believers  believe in the belief of god and atheists believe in belief of no god.