Can you explain the philosophical concept of non-duality and the 'shattering of the triad' as described by the author in Chapter 35?

In Chapter 35, the author describes a profound mystical experience of non-duality, where the presence of Sai pervades all perception and dissolves the separation between subject, object, and action. This is referred to as the shattering of the 'triad.' For instance, when gazing upon Sai, the distinction between 'the seer' (the devotee), 'the seen' (Sai), and the act of 'seeing' itself vanishes, erasing all duality. The chapter extends this concept to other senses, explaining that when a word is heard, Sai's form manifests, and the triad of 'the hearer,' 'the heard,' and 'hearing' flies away. This advanced concept from Chapter 35 points to a state of complete union with the Guru, where the individual self merges into the all-encompassing consciousness of Sai.