How does Chapter 4 connect the general mission of saints to the specific divinity of Sai Baba?

Chapter 4 first establishes the broader purpose of saints, stating they build a 'temple of Ultimate Truth' on the 'foundation of Renunciation' to uplift devotees. After outlining this selfless mission, the text transitions to identifying Sai Baba as the embodiment of this divine principle. It states that the one who brings joy to the world is the Supreme God and the Guru, who is also the 'Joy-giving Shankar.' This supreme being, identified as Sai, is described as eternal, non-dual, and beyond all limitations of time and space, so profound that even the Vedas could only describe Him through negation by saying 'Not this, Not this' (Neti-Neti).