The Self is not the ‘I’. The ‘I’ is present in the form of the mind. The mind (I) is present in the form of the universe.+

Deeper Self-search reveals that the Self is neither the waking entity nor the Self is dream entity, but the Self is the invisible Soul, which witnesses the coming and going of the three states. This has to be mentally grasped and assimilated to realize the invisible  Soul; the  Self has nothing to do with the three states.

From the standpoint of the formless Soul, the Self, the three states are merely an illusion.

The seeker has to think and reason deeply and realize:~

The Self is not the ‘I’. The ‘I’ is present in the form of the mind. The mind (I) is present in the form of the universe. And the universe (I) appears as the waking (I) or the dream (I) and disappears as deep sleep. The duality (I) is present only in waking or dreaming.

The duality (I) is absent in deep sleep. That is, the duality (I) is present when the nonduality is absent. Nonduality is the nature of the Soul. Therefore, the Soul becomes the mind (I). And mind (I) becomes the Soul. 

The Soul and mind (I) are one in essence. That essence is the Soul, which is present in the form of consciousness. Consciousness is the ultimate truth or Brahman or God in truth.

Deeper Self-search reveals the fact that the Self is neither the waking entity nor the Self is the dream entity but the Self is formless Soul, which witnesses the coming and going of the three states in succession without the physical apparatus. This has to be mentally grasped and assimilated to realize the formless Soul, the innermost Self is nothing to do with the three states. 

From the standpoint of the formless Soul, the Self, the three states are merely an illusion.

The seeker has to think and reason deeply and realize:~ The Self is not the ‘I’. The ‘I’ is present in the form of the mind. The mind (I) is present in the form of the universe. And the universe (I) appears as the waking (I) or the dream (I) and disappears as deep sleep. 

The duality (I) is present only in waking or dream. The duality (I) is absent in deep sleep. That is, the duality (I) is present when the nonduality is absent.

 Nonduality is the nature of the Soul. Therefore, the Soul becomes the mind (I). And mind (I) becomes the Soul. The Soul and mind (I) are one in essence. That essence is the Soul, which is present in the form of consciousness. Consciousness is the ultimate truth or Brahman. :~Santthosh Kumaar