Can you explain the philosophical concept of the dissolution of the 'triad' as described at the end of Chapter 35?

The end of Chapter 35 describes a profound state of non-duality experienced by a devotee. It explains that when the devotee's vision is completely focused on Sai, the "ocean of mercy," the distinction between the observer, the observed, and the act of observing disappears. This is referred to as the triad of "the seen, the seer, and the seeing" vanishing. This principle extends beyond sight to all senses. As Chapter 35 elaborates, when a word falls on the ears, Sai's form manifests, and the triad of "the heard, the hearer, and the hearing" shatters at once, signifying a complete spiritual union where all duality ceases.