Self-Knowledge or Brahma Gnana or Atma Gnana destroys ignorance and makes one free from experiencing duality as reality. The subject-matter of the Self-Knowledge or Brahma Gnana or Atma Gnana is Soul. Formless soul is present in the form of consciousness. consciousness is the only Reality because the three states are created sustained and finally dissolves as consciousness. Soul-centric reasoning is the only tool to acquire Self-Knowledge or Brahma Gnana or Atma Gnana .
The transmigrating self is indeed ultimate reality. The one who knows the “Self “as “Soul”, which is beyond form,time and space becomes one with it. Through Self-Knowledge or Brahma Gnana or Atma Gnana one becomes aware of the fact that, the idea creator and creation are base on the false self(ego or waking entity) within the false experience.
The experience of birth, life and death are based on the false self (ego or waking entity) with the false experience(waking). by realizing the existence of the formless witness,which is the soul and negating the three states mentally by realizing the three states are one in essence leads one to non-dual Self-Awareness.
The ultimate truth cannot be directly described by words because it is not and entity or identity or thing within the waking or dream. It is the within the three states but it is without the three states because it is formless and apart from the three states. It is within the three states as their formless substance and it is apart from the three states as their formless witness. Therefore, the substance and witness of the three states are one in essence. That essence is consciousness. therefore consciousness alone is real and eternal.
The three states appear to be real, because of our ignorance. In self-awareness the form,time and space are one in essence. thus there is no second thing other than consciousness. The soul is not limited by form,time and space. The limiting the soul or consciousness, the innermost self to the physical entity is cause of ignorance. Ignorance is cause of experiencing the duality as reality
Because of the soul all the activities in the waking or dream takes place. The soul is main power behind the physical existence or universe or waking. From the ultimate stand point soul or consciousness alone exists. the three states are ere mirage created out of consciousness.
from ultimate standpoint The three states are unreal. just as an object experienced in dream cannot have any association with an object known in the waking experience. The form, time and space are reality within the waking and dream. The dream becomes unreal when waking takes place similarly the waking becomes unreal when the non-dual wisdom dawns.