When Self-Awareness arises, this ignorance is destroyed then the self, which is in the form of consciousness alone remains, which can never be negated.

In deep sleep there is neither birth, nor life, nor death, nor world, nor gods, nor is there total void, since consciousness alone   exists as free from experience of waking or dream.

The experience of birth, life, death and the world are based on the false self within the false experience.  On the base of the false self and the false knowledge, the waking experience is experienced as reality. But when that false knowledge is not there, such notions also do not exist, as in the state of deep sleep.

When the wisdom dawns than waking experience cease to be a reality, the dream ceases to be a reality; deep sleep ceases to be reality because there is no division in consciousness, because everything is consciousness. Thus three states are mere mirage created out of consciousness.  Thus consciousness alone is all else is illusion.  

 In the deep sleep there is neither waking nor dream experience.  The dream is parallel waking and waking is parallel dream. In the deep sleep experience the waking or dream too is dormant and consciousness alone is there. In deep sleep there is only non-dual tranquility and total ignorance of everything, as is proved by the fact that, when a person wakes up from sleep he or she says, “I slept deeply, I did not know anything”. This proves that the soul, which is in the form consciousness, exists in the deep sleep in its formless non-dual true nature. In deep sleep there is nothing but the consciousness in its own awareness. The waking or dream is only a mirage created out of consciousness. Due to ignorance the mirage is experienced as reality by the false self within the false experience. When Self-Awareness  arises, this ignorance is destroyed then the self, which is in the form of consciousness alone remains, which can never be negated.