The nature of the soul is formless and non-dual . Duality is the nature of the mind. the mind is present in the form of universe. the universe appears as waking or dream(duality) and disappears as deep sleep(non-duality) The three states are sustained by the indwelling soul . The soul is present in the form of consciousness. Consciousness pervades everywhere and everything in all the threes states.
One has to know that the formless soul is the womb of the mind. Soul is the origin of all the three states and also its dissolution.
There exists nothing whatever higher than the soul, the innermost self. When the Mind return to the soul, this is called awakening , liberation, freedom. Having known the true Self , one knows everything. In this awakening the all the three states is discovered to be within the soul, the innermost self. All the three states are within the soul , and the soul or consciousness is all the three states, because they are created out of the soul or consciousness.
This is ultimate understanding . Knowing this , one knows ultimate truth. If one doesn’t know this , he is still in ignorance , regardless of how much information he has accumulated. Without the knowledge of the true self , one remains ignorant and he experiences the illusion as reality. Having known the ultimate truth , soul is everything … without beginning , middle , end , without birth, life or death.