The body, ego and the world within the waking or dream are mere mirage created out of consciousness, the innermost self.

Mind (universe)    merges into  soul (Consciousness) and remains not as mind, but as soul(Consciousness)  without the waking or dream. When the soul  wakes ups consciously  to   its formless  true nature in the midst of waking experience  then there is no duality even though the universe exists.  it is the state of the wisdom and there is no trace of ignorance.  A Gnani is  in conscious of the fact that even though he has the body it is not the body, even though he has the ego it is not the ego , even though  the world confronts him it is not the world but everything  is consciousness.   The body, ego and the world  within the waking or dream are mere mirage created out of consciousness, the innermost self. 

In ignorance or illusion, one first forgets the soul (Consciousness), which is the true self,and views and judges the worldview on the waking entity or ego ,which is the   false self within the false experience. 

All the memories belong to the waking entity or false self, not to the formless soul,which is the innermost self. The whole  waking experience  dependent on soul , the innermost self  for its existence.  Therefore, on the standpoint of the soul, the innermost self, the memory is mere illusion because it is based on the waking entity,which  false self within the false experience.  

The waking or dream is the world of objects. And waking and dream is an object to the soul, which is the subject.  Without the knowledge of the subject the object will remain as reality. Once one becomes aware of the subject the reality of the object cease to exist as reality. 

The knowledge of object [body] as subject is cause of the ignorance.  Thus it is necessary to examine the nature of the object in order to realize the fact that , the object is not the subject. and object and subject are one in essence. 
 

 The subject is not the form but it is formless.  The knower of the object is the subject, which is consciousness. So, the object has no existence without the subject. Therefore it is erroneous view and judge, the truth on the base of object as subject. 

consciousness  pervades everywhere and everything in the objective world(waking or dream) . deep sleep is also the state of ignorance .Deep sleep is unconscious self-awareness.  deep sleep is unconscious   object-less awareness. 

One can say about his deep sleep experience only when waking takes place that is in the states of ignorance. 

Deep sleep is nothing but unconscious Self -Awareness. When one becomes of the fact that, the three states are one in essence then one is in conscious Self-Awareness in the midst of duality.