The universe appears waking experience (duality) and disappears as the Soul, the Self in deep sleep (nonduality).+

The universe in which we exist is present only in waking experience. The universe appears waking experience (duality)   and disappears as the invisible Soul, the Self, in deep sleep (nonduality). 

In reality, the Gnani, Gnana, and the world are one in essence. That essence is the Soul, which is present in the form of consciousness. 

Consciousness is the formless substance of the universe. Consciousness is the cause of the universe. Consciousness is also the source of the universe. Thus, the whole universe in which we exist is nothing but consciousness.  

Suppose if we are discussing some topic in the dream, the dream becomes unreal when waking takes place. Similarly, the waking experience (the universe) becomes unreal when Advaitic wisdom dawns. 

The Advaitic wisdom dawns when you realize the Self, not you but the invisible Soul. 

If the Self is not you, then whatever is seen, known, believed, and experienced as 'you' is bound to be a falsehood.  

The falsehood (three states) is created out of the single stuff; that single stuff is the consciousness. Knowledge of the single stuff is Self-knowledge or Brahma Gnana or Atma Gnana. 

It takes time to understand and assimilate what I am saying, but as we go deeper and deeper, the truth starts revealing itself on its own. Advaita is not a teaching or a theory, but it is the knowledge of the invisible and unborn Soul, the Self. 

Moksha as meaning liberation from the cycle of transmigration, pertains to the lower or purely religious sphere. This doctrine is on the lower level because it is based on the reality of form, time, and space. 

From the Advaitic perspective, the interpretation of the word is "liberation from ignorance." Similarly, the word Nirvana is interpreted in Buddhist countries as the meaning of release from the cycle of births and deaths. This, too, is the popular interpretation, not philosophical, which is precisely the same as the Advaitic perspective. 

It is quite true that Buddha constantly taught that man should seek release from transmigratory existence, but we must remember however that what the sage knows is known only to himself in its fullness and that he gives out to the public only so much as they could grasp and no more. : ~ Santthosh Kumaar