In what way is Sai Baba's divine nature described in Chapter 4, and how is He related to the Supreme God?

Chapter 4 elevates Sai to the status of the Supreme Divinity. It explicitly states that He who brings joy to the whole world is the Inner Self and the Supreme God, and that this God is also the Guru, identified as the joy-giving Shankar. According to this chapter, Sai is the object of ultimate love, eternal, non-dual, and beyond all limitations of place, time, or object. The text emphasizes the inadequacy of language to describe Him, noting that even the four levels of speech get tired and the Vedas themselves resorted to saying 'Not this, Not this' (Neti-Neti) in their attempt to define His limitless nature, as explained in Chapter 4.