Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear." --Thomas Jefferson
He who is freed from all the doubts and confusions by deeper inquiry, analysis and reasoning reaches the non-dual destination. Seeker has to follow the footprints of the Gnani and advance with care by means of such mental trekking; he will reach the source.
The journey of reason brings joy to those who dare to accept the truth and drop the untruth mentally.
Non-duality is neither selfish nor it is indifferent way of living. It all depends on the medium through which one observes and views it. In fact our mental and intellectual condition will determine the object observed and experienced. The common man viewing his-self and the world see it differently from the Gnani (sage) viewing the same world and his -self. Each one interprets the objects he sees in terms of existing knowledge. A Gnani sees the spirit/true self/spirit everywhere and everything in experience diversity, therefore he is fully aware of the fact that there is no second thing other then the spirit, hence it is non-duality.
Until one views on the standpoint of physicality the experience pain and pleasure are reality. When one becomes aware of the fact that, the true self is not physical then the pain and pleasure or birth, life and death are mere mirage created out of true Self/spirit, which is not physical.
The one who has gained perfection is one who has acquired the self- knowledge. The self knowledge is the knowledge beyond the physicality. One who has delved into and realized the sense of infinitude when he transcended consciously all his identification with three states and become one with the witness consciousness.