The text mentions the 'triad' vanishing. What does this mean in the context of a devotee's experience of Sai?

In Chapter 35, the vanishing of the 'triad' refers to the dissolution of the sense of duality in a devotee's consciousness. For example, the text mentions the triad of 'the seen, the seer, and the seeing.' In an ordinary state, these are distinct: there is an object being seen, a person who is seeing, and the act of seeing itself. However, in the profound spiritual experience described, Sai's presence is so all-encompassing that this separation collapses. The devotee merges with the experience, and the distinction between subject, object, and process is erased. This principle is also applied to hearing ('the heard, the hearer, and the hearing') and taste, signifying a state of non-dual unity with Sai.