How does Chapter 4 portray Sai's identity in relation to the Supreme God?

In Chapter 4 of the Sai Satcharitra, Sai is equated with the highest divinity, the Inner Self, and the Supreme God. The text explicitly states that He who brings joy to the whole world is this divinity, and that He who is God is the Guru, identifying Him as the joy-giving Shankar. This divine being is described as the object of ultimate love, eternal, and non-dual, existing beyond any limitations of place, time, or object. The chapter emphasizes this boundless nature by noting that even the Vedas could not fully describe Him, ultimately resorting to the phrase 'Not this, Not this' (Neti-Neti).