The SelfKnowledge Brahma Gnana frees the Soul from the cage of ignorance. When the ignorance vanishes the Soul becomes free from experiencing the dualistic illusion as a reality. It is the Soul, that is in ignorance and it is the Soul that becomes free from the ignorance.
It is the ignorance of the real nature of the Soul, is the cause of experiencing the dualistic illusion as a reality. An urge to realize the truth beyond the form, time and space is necessary. Without longing for realizing the truth, it is impossible to realize the formless, timeless and spaceless truth.
Self-knowledge or Brahma Gnana or Atma Gnana helps to a raft upon which one crosses a swift river to get to the other side of the dualistic illusion, once the shore beyond the form, time and space is reached; there is no longer any need to carry the raft because the Soul, the innermost Self, remains in its own awareness. In self-awareness, the river and person crossing the river itself is an illusion. The Soul, which is present in the form of the consciousness alone, is real and all else is an illusion.
Let us think in a different direction. Let us divide the existence into two parts: the known and the unknown. That which is known as the waking or the dream was unknown in the deep sleep. The waking or the dream (duality) is the known and the deep sleep (nonduality) is the unknown
The unknown become known only in the waking. The known become unknown and unknown becomes known. What is it that becomes known and unknown? It is the Soul which is present in the form of the consciousness playing the hide and seek.
Only the consciousness is bridgeable between known and unknown. The difference between known and unknown is only because of ignorance of the Soul, the innermost Self.
Through self- knowledge or Brahma Gnana or Atma Gnana, the ignorance diminishes and there neither the known nor unknown but only the eternal awareness prevails.
Self-knowledge or Brahma Gnana or Atma Gnana is not any preaching or teaching based on the dogmas of the religion, nor a theory nor scriptural studies. Self-knowledge or Brahma Gnana or Atma Gnana is buried under by the religion and diverse philosophies and theories.