What defines the 'State of Oneness' and what is the experience of one who attains it?

The 'State of Oneness,' as described in the text, is a profound spiritual realization achieved by completely 'discarding the feeling of duality.' In this state, an individual perceives that everything in existence, both 'moving and unmoving,' is fundamentally Brahman by nature. Chapter 4 explains that this leads to the powerful realization that 'I am everything' and that the glory of the universe is a reflection of one's own eternal majesty. The experience is one of supreme happiness and devotion that is so profound it cannot be adequately described. It is the state where the distinction between self and the universe dissolves completely.