Could you explain the state of oneness and non-duality that Sai Baba embodied?

The state of oneness that Sai Baba embodied is described in Chapter 4 as the pinnacle of spiritual realization. It involves 'discarding the feeling of duality,' where the distinction between the self and the universe dissolves. In this state, one perceives everything—both 'moving and unmoving'—as Brahman by nature. The text poses that when one fully realizes 'I am everything' in relation to the entire world, an indescribable happiness and supreme devotion are attained. This perspective eliminates all basis for conflict or fear, as Chapter 4 questions, 'with whom shall one be at enmity? Why or of whom should one be afraid, when nothing else is known?' This was Sai's natural state of being.