How does Chapter 4 of the Sai Satcharitra establish Sai Baba's identity as the Supreme God?

Chapter 4 elevates Sai Baba to the highest spiritual status by identifying Him with the ultimate reality itself. The text states that He who brings joy to the world is the Inner Self, the Supreme God, the Guru, and the joy-giving Shankar. This Supreme Divinity, embodied by Sai, is described as the object of ultimate love, eternal, and non-dual. Chapter 4 emphasizes that He is beyond all limitations of place, time, or object. The text further asserts His transcendent nature by stating that the four levels of speech cannot describe Him and that even the Vedas, failing to grasp His essence, resorted to the process of negation, saying 'Not this, Not this' (Neti-Neti).