Do not give what is holy to the dogs; nor cast your pearls before swine, lest they trample them under their feet, and turn and tear you in pieces"

All biblical insights lead to an inner realm (Kingdom of Heaven).   It is very difficult for the people to understand the biblical insights.  They understand only the physicalized version.

The spiritual essence of the bible: - first it says, there is God than it says God is within and then it says SELF is God (I AM GOD). If Biblical insights are physicalized than it gives dualistic meaning.  Only a few will be able to recognize the Advaitic or non-dualistic essence hidden in the Bible.

People who are conditioned by religion will not accept anything other than their accepted truth. Physicalized version the scriptures are meant for the people who believe the practical life within the practical world as reality.  

The self –knowledge or Brahma Gnana or Atma Gnana is meant for who is seeking ultimate   truth or real  God. 

That is why Jesus said:-

Do not give what is holy to the dogs; nor cast your pearls before swine, lest they trample them under their feet, and turn and tear you in pieces" (Matthew 7:6).

Jesus spoke of religious leaders who were offended by what he said: "Let them alone. They are blind leaders of the blind. And if the blind leads the blind, both will fall into the ditch" (Matthew 15:14).

It is difficult for tradition-bound people to accept anything as truth other than what they inherited from then parental grooming. Only intense urge to know the truth and courage to accept the truth after verification with better understanding one will be able to drop all his accumulated dross, which is the main obstacle in self-realization.

A person who is not able to grasp the nondual truth should constantly reflect on the formless substance witness of the three states, without distraction.

A person, who has realized the fact that the Self is neither the waking entity nor self is dream entity but the formless substance and the  witness of the three states, realizes the self is beyond form, time and space.