How does the story of Kaka Mahajani's friend serve as a practical example of the principle that 'the triad of the heard, the hearer, and the hearing fly away'?

Chapter 35 opens with a description of non-dualistic experience, where the devotee becomes so absorbed in Sai that the separation between the senses, their objects, and the act of perception dissolves. The principle that "the heard, the hearer, and the hearing fly away; the triad shatters at once" is perfectly illustrated by the story of Kaka Mahajani's friend. The friend arrived as a distinct 'hearer'—a skeptical observer separate from the events. However, when he 'heard' Sai Baba's voice (the 'heard'), the experience was so profound and identical to his father's that his identity as a separate observer shattered. He was no longer consciously 'hearing' but was completely consumed by the experience, causing him to forget his resolve and bow instinctively. The distinction between himself, the sound, and the act of listening vanished in that moment of astonishment.