The ignorance is due to the self is considering itself as physical entity and perceiving the world

The  ignorance is due to the self is considering itself as physical entity and perceiving the world. When the self is the formless soul, how the physical entity/ego can be the self. Therefore it is necessary to decide, whether the physical entity /ego is the self or something other then the physical entity/ego is the self, in order to unfold the ultimate truth. 

The witness is not the physical entity but the one that witnesses the waking or dream as the whole, which appear, and disappears as a whole. Thus, the individual experiences are part of the waking and dream cannot be real on the standpoint of the soul, which is permanent. 

In order to overcome the duality, the seeking mind has to reflect steadfastly to the nature of the mind, to realize the mind is mere mirage. Therefore, the happenings within the mirage have to be part of the mirage. Thus, individual experiences such as birth, life and death has to be the part of the mirage. Constant reflection on the formless witness helps the seeking mind to divert its attention from the physical existence to its formless existence.
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All the accumulation of physical based knowledge and physical activities are the cause of the impurity of the self. Mind means impurity. Purity means the soul/self in its formless non-dual nature.

Purification of the mind means discarding the physicality. Mind cannot be purified through yoga, religious rituals or intellectual thinking or scriptural studies but realizing the fact that the physical entity /ego is not the self ,and also knowing what is mind and what is the substance of the mind. The physical existence that appears as waking or dream sustained due to physical attention. Once the attention of the soul/self is in itself, the physical existence disappears. In deep sleep, the attention of the soul/self is on itself, therefore, there is no duality. Thus, there is a need to know the waking entity is not the self but the true self is the one, which witnesses the three states. Deep sleep is not the self, but the knower of the three states is the true self. The nature of the true self is like deep sleep.
By becoming conscious of the formless witness of the three states leads to self-realization. Self-knowledge frees the seeking mind from experiencing duality as reality. 

Self—knowledge is the direct and infallible means of being aware of the ever-present and all enveloping the soul/self. The experience of duality is caused by the ignorance of the soul/self. Self-knowledge is only sure antidote. Through self-knowledge, the seeking mind is able to focus its attention on the very source from where the mind rises and subsides. 

Self-knowledge is the potent tool to live a life, which is free from the illusion of birth, life and death. Self-knowledge validity will remain untouched by time. The entire search ends when one assimilates the self-knowledge. The self-knowledge helps to replaces, envelops and fills the space occupied by the illusory physical existence. That is, it helps to realize mind is created out of spirit, sustained by spirit and finally it dissolves as spirit. 

Holding the physical body/ego as self is an error, which has to be rectified before proceeding in deeper in pursuit of truth. It is no use of wasting time in physical based accumulated knowledge. The inquiry on the physical base will not yield any fruits. Until and unless the seeking base is rectifies from form to formless it is difficult o understand and assimilate the non-dual truth.
People are stuck with their inherited accumulated ideas, and they refuse to verify the validity of their belief. Deeper inquiry revels the fact that, neither the body, nor the’ I’ is the true self. Therefore, it is necessary to find the true self , then base everything on the true self and judge the truth on the base of the true self. 

On the base of the physical entity/ego, it is impossible to assimilate the self-knowledge. There is no use of searching for truth in religion and religion based realities or physical based meaning of life. The fundamental error is taking the ‘I’ as self and viewing judging the three states on the base of the ‘I’, which is the false self, within the false experience.

The core of one’s existence is ever empty and is untouched by duality /illusion

The core of one’s existence is ever empty and is untouched by duality /illusion; it is the source of the mind from where the mind rises and subsides and it is   ultimate reality, it belongs entirely to itself, which is never part of the unreality.

It is like a pure diamond blazing with the invisible light. It is in everything and everywhere in the three states, and if one could observe it mentally, he would grasp the truth all the diversity/illusion caused by ignorance vanishes completely.

An important part of pursuit of truth is being receptive to receive the truth.  Some find it easier to be receptive, and some find it hard because they want everything to be within the scope of their preconceived ideas.

When one is receptive he does not barricade himself to fresh flow of knowledge derived from deeper thinking. He does not try to defend himself on his accumulated ideas, but he is open to the mystery by inquiring what he believes in.

When one is not trying to find himself within some particular concept or feeling, then the receptiveness expands until his true identity becomes more and more the clearer, rather than sticking to  some belief or a particular feeling in the physical body. It is not to get rid of thoughts or feelings or experience, but just not to feel located inside of them. 

The mind is not limited to ego, but to the whole experience of duality

Deeper inquiry, analysis reveals the fact that, when one limits the mind /’I’ to the physical entity, then it becomes ego/physical self. The mind is not limited to ego, but to the whole experience of duality [waking/dream].
The body, ego, world appear together and disappears together. Since our understudying and assimilation is based on the ego it becomes impossible cross the threshold of duality or mind. Therefore it is necessary to know the fact that ‘I’/ego is not the self, the self is that which pervades in everything and everywhere in all the three states, as their formless substance and witness. On the standpoint of the formless witness of the three states the three states are unreal. Thus the ego, body and the world are unreal, that is the waking also is as unreal as the dream.

The known is unreal and the formless knower is real and eternal

The true wisdom is not based on physicality.  The known is dependent on knower. Without being aware of the formless knower the freedom is impossibility.  The known appears and disappears as three states in succession.  The known is unreal and the formless knower is real and eternal.  The man and his experience of the world exist within the known.  The formless knower of the known is within and also is apart from the known.  The formless knower is within the three states as their formless substance, and it is apart from the three states as their formless witness.  It is apart because it is not an entity or identity within the waking/dream/known.  

People say  -I have all my life wondered and went through all but I still exists , I want to understand who I am? and I still wonder why I do all this? I look into my own self has no motive what is it that I am still enquiring? persiving? meditating? why am I with my being came with so many fragments? why my eyes still goes back to see my ownself?Why I still move?Where am I going? The total consiousness , mankind 's suffering must end by all means , is that the reason I move?---- all these are  based on the false self [ ego/physical self ] within the false experience[waking or known] and  it is  not based on the true self, which is the formless knower of the three states.  

 When mind/’I’   is there, then the body, ego and the world are there.  Absent of the mind/’I’ is absent of ego/body and mind/’I’.  The mind/’I’ appears as waking and dream, and disappears as spirit, which we call in ignorance as deep sleep.   Thus the individual experiences are based on the false self /ego within the false experience, which is impermanent. The formless knower of this impermanence is real and eternal. 

 Since one limits the mind to his physical entity , he remains ignorant of the formless knower and thinks his physical entity as true self, and judges the truth on the base of false self, and remains  permanently ignorant of  formless knower, believing the known[duality] as reality.  Until, one’s understanding is based on the waking entity, it is impossible to assimilate the nondual truth.

It is necessary to know the fact that, man and his experience of the world are reality within the waking experience, and waking experience is mere mirage on the stand point of the formless knower/witness of the three states.   The dream man and his experience of the world are reality within the dream, likewise the man within the waking experience and waking world are reality within the waking experience. The dream becomes unreal when waking takes place; similarly the waking becomes unreal when the nondual wisdom dawns.   The nondual wisdom dawns when one becomes aware of the formless witness/knower of the three states and realizes the fact that the formless knower [soul/true self] and the known [three state] are one in essence.  When the nondual wisdom dawns there is neither knower nor known only nondual reality.

It is necessary to learn to view and judge the truth on the base of the formless knower/witness  of the three states, in order to unfold the mystery of the mind/’I’, which is myth. To realize “What is truth?”, and “What is myth?” one has to go in deeper inquiry, analysis and reasoning on his own, because to search, understand, assimilate and realize  nondual truth, within the frame work  of some teaching is  impossibility.

I /mind rise and subside in the formless source. Thus, becoming aware of the formless source is necessary in order to understand and assimilate the self-knowledge.

What exists eternally is the soul, which is in the form of consciousness.

Dream is an experience. The Dream body + dream ego and the dream world are mere experience, which appeared and disappeared.  Likewise the waking body ego and the waking world are also mere experience, which appears and disappears same way as the dream.  The dream entity is limited to dream, and waking entity is limited to waking experience. The one that witnesses, the three states, is formless, apart and eternal. This has to be mentally grasped.  What exists eternally is the soul, which is in the form of consciousness.

 The words are mere communication purpose. When   one bases his understanding on the physical base then the word and thoughts continuously convey something. When one’s understanding is firm with conviction that the soul is the true self, then for him the words, thoughts and experience is mere mirage. 

 When one is fully aware of the fact that, the body and the world are mere experience, and the author of the experience [body+world] is not physical, but the formless spirit, he is fully aware of the fact that ‘I’/YOU/ME is mere experience, and whatever is experienced on the base of ‘I’/YOU/ME is also an experience.  Thus, one has to realize the fact that, the author is formless and experience is form. The formless is eternal and form is time bound.