Knowledge of the self-gathered from books or gurus and other sources can never emancipate a man until its truth is rightly investigated and applied; only direct realisation will do that. Realise yourself, turning the mind inward.
Virtue implies vice,when one thinks of one he has to think of the other, hence duality. virtue is thorn to pull out another thorn of vice. But both are one in essence. that essence is consciousness.
The Gnani has realized the duality is mere illusion is created out of single stuff. The duality which is present in the form of universe is mere illusion created out of consciousness.
People speak of getting rid of conditioning or samskara but they themselves are unaware of the fact that, the universe in which they exist is product of the inborn samskara or conditioning. The ignorance is cause of the inborn samskara or conditioning which present as ‘I’ or ‘I AM’. I or ‘I AM’ itself is cause of ginormous.
Eradicating the ignorance completely is necessary. And this is possible only through self-knowledge or Brahma Gnana or Atma Gnana. Thus, there is no other road to freedom other than Gnana. There is no other entrance other than except Gnana. The ignorance will vanish only when the nondual wisdom dawns.
That is why Sri Sankara, indicated in Bhaja Govindam says: - (Jnana Viheena Sarva Mathena Bajathi na Muktim janma Shatena) - one without knowledge does not obtain liberation even in a hundred births, no matter which religious faith he follows.
Then it is no use going roundabout way, trace the Brahman which is the formless substance and witness of the universe, which is in the form of mind. By tracing the source of the mind or universe one will be able to realize the Brahman.
Thus, the Self-knowledge or Brahma Gnana or Atma Gnana is meant only for those who have intense urge, and courage to accept the truth with humility and reject the untruth. Since people start comparing with their scriptural knowledge, it becomes impossible to assimilate and realize the non-dual truth. Therefore, there is no need to convince anyone other than our own-selves to get the firm conviction.