Chandogya Upanishad: - sarvam khalvidam brahma - all this (universe) is verily Brahman. By following back all of the relative appearances in the world, we eventually return to that from which it is all manifest – the non-dual reality.
As soon as word "mind" is uttered people think “the mind of an individual", whereas the mind is appears as a whole waking or dream(duality) disappears as deep sleep(non-duality). The body and the world are within the mind. Thus individual and individual experiences are happenings within the mind.
Witness means which is aware of the appearance and disappearance of the three states.” This is an important and vital difference. The mind appears to the witness, which is the formless soul. The soul is in the form of consciousness. The soul is also the substance of the mind.
Mirage or illusion means which appears to be reality but by close examination one becomes the unreal nature of the mind, which appears as universe, and becomes aware of the substance from which it is created of.
There is always confusion and there is no clarity about truth when one considers the waking entity as self. Therefore, the self cannot be that, because on the base of soul, which is the true self there is no confusion and always clarity.
When the mind appears all confusion and doubts arise and when mind disappears all will the doubts and confusion will vanish. Then what is that is aware of the appearance disappearance of the mind. The physical existence(man + universe) is limited to mind, and it is mind. Therefore, mind is limited to the physical existence.
One cannot make the mind clear; without understanding the formless substance from which the mind is made. The nature of the mind is diversity. Thus understanding the mind is necessary to understand and assimilate the ultimate truth.
65. As a treasure hidden underground requires (for its extraction) competent instruction, excavation, the removal of stones and other such things lying above it and (finally) grasping, but never comes out by being (merely) called out by name, so the transparent Truth of the self, which is hidden by Maya and its effects, is to be attained through the instructions of a knower of Brahman, followed by reflection, meditation and so forth, but not through perverted arguments.
Mind is mere illusion. If one never verifies the facts about the mind than he will remain ignorant about the facts about what is mind. . Without verifying the fact about the mind one keeps experiencing the duality as reality. When the illusion is taken as reality all the judgements will be based on the waking entity, which is false self, within the false experience, thus all conclusions will be based on the intellectual speculations; therefore one will not be able to understand and assimilate the ultimate truth.
Thus experiencing the pain and pleasure within the illusion with the illusory self, within the illusory experience, has to be illusion. The illusion is created, and sustained, and finally dissolves as consciousness, which is the innermost Self. Since, there is no second thing other than the consciousness (soul); the consciousness itself is ultimate truth or Brahman. The one who has realized this truth for him this illusion is passing show because he is fully aware of the fact that his body, his ego and his experience of the world to be consciousness. Practical peoples approach is more practical, and they are stuck with the reality of the practical life within the practical world, they take it as real whereas for Gnani has the firm conviction that:-
Formless soul or Consciousness is the witness that experiences the action, the actor, and the world of separate things. It is like a light that illuminates everything in a theatre, revealing the master of ceremonies, the guests, and the dancers with complete impartiality. Even when they all depart, the light shines to reveal their absence.
What is not consciousness (formless) in the experience of diversity (universe or waking)? The waking and the dream cease to exist without consciousness. The seeker, seeking and his destination all are one in essence.
Thus experiencing the birth, life, death and the world within the illusion (waking or universe) with the illusory self (waking entity or ego), within the illusory experience (waking), has to be illusion.
The illusion is created, and sustained, and finally dissolves as consciousness, which is the innermost Self. Since, there is no second thing other than the consciousness (soul); the consciousness itself is ultimate truth or Brahman. The one who has realized this truth for him this illusion is passing show because he is fully aware of the fact that his body, his ego and his experience of the world to be consciousness. Practical peoples approach is more practical, and they are stuck with the reality of the practical life within the practical world, they take it as real whereas Gnani sees his body his ego and his experience of the world as consciousness.
Only when one investigates the mind through deeper self-search than he will be able to transcend the mind. The clarity comes only when he knows the mind is not within the body but man and universe are within the mind. There is not such a thing as a mind in the realm of truth; never has been and never will be. Mind means the illusion, in which the whole universe with all its contents exists. When there is no mind there is no illusion.