Discovering truth is one thing and Understanding and assimilating is another thing and realizing it is yet another thing.

Upanishads say "He who thinks he knows, does not know." This means that to know anything implies a second, an object of knowledge, hence duality, i.e. no Gnana.

One thinks there is mind when he has thoughts, but when thoughts are not considered different from the consciousness, which is the true self, then where is the division into, waking, dream and deep sleep etc.

Void implies to duality: the universe may not exist but the thought of the second is there. If one knows there is Void (emptiness or nothingness), then there is something there to be known and know. They are or have become consciousness

Since people use their accepted truth as yardstick, they will not be able know what we say. They think they have mastered the whole Advaith philosophy or some teaching of great master but they will not be able to realize the non-dual truth.  Such people are like stagnant water collected in the pond, which stinks of their accumulated dross. They block the new knowledge to come in.  Very few like you are fortunate to go to the ultimate end and realize it.  

Discovering truth is one thing and Understanding and assimilating is another thing and realizing it is yet another thing.  

  

The non-dual truth is very easy but very difficult to assimilate and realize it. The one who realizes the fact that, body and the universe are created out of consciousness, and then there is nothing else to know. By knowing and realizing  this truth  there is unity in diversity. There is no second thing exists other then consciousness. The diversity is mere mirage created out of consciousness. 

Since, they are stuck with the idea that the body is made of flesh, bone and blood and universe is of the matter, they will be unable to accept their birth, life, death and world as illusion.  By accepting the illusion as reality they will remain judging the worldview on the base of birth entity.  Whereas, the true self is not the birth entity but it is the formless substance and witness (consciousness) of the illusory birth, life, death and world.    For one who is aware of the consciousness as self, is also aware of the fact that, birth, life, death and world are mere illusion created out of consciousness.   

 Consciousness can never be destroyed, but it resolves back to its formless non-dual true nature. Nothing is beyond or higher than the consciousness. – Mind and the soul [consciousness] are essentially one, as are the ocean and the waves. As long as illusion exists the separation exists. As long as separation exists duality will prevail as reality. So long the ignorance prevail, the birth, life, death and the world will remain as reality. But when one awaken into reality, all the reality of illusion cease forever. 

Neither by Yoga, nor by scriptural studies, nor by action, nor by learning, but only by the realization of one's identity with consciousness freedom is possible, and by no other means.

Lectures consisting of a shower of ornamental words, the skill in expounding the Scriptures or intellectual theories, and likewise erudition - these merely bring on a little personal enjoyment to the scholar, but are no good for freedom.

The study of the Scriptures is useless so long as the highest Truth is unknown, and it is equally useless when the highest Truth has already been known.

The Scriptures consisting of many words are a dense forest which merely causes the mind to ramble. Hence one should earnestly set about knowing the true nature of the Self, which is consciousness.

Most seekers have accepted some philosophy as truth or some teaching as truth. Just by studying teachings of Sri, Ramana Maharishi and Sri, Nisargadutta Maharajah Self-Knowledge or Brahma Gnana will not arise , but one has to do his own home work and  find the obstacles in their teaching, which blocks him from realizing the ultimate truth or Brahman.  

The ultimate truth or Brahman  is easier without any teaching. Mostly people are sentimentally and emotionally get involved with their teachings and blindly accept whatever said in those teaching and refuse to verify the facts. This sheepish mentality is greatest obstacle in pursuit of truth, because it makes one more and more egocentric, not soul centric. 

In the scriptures, it says that the world is both real and unreal. It is real because it is a manifestation of consciousness, but is unreal, in the sense, that it is not absolute and eternal like consciousness itself.

Most of the teachers and thinkers approach was more practical, and they have stuck with the reality of the world, they took it as real.