In what ways does Chapter 4 elevate Sai Baba to the status of Supreme Divinity, and what philosophical concepts are used to describe His nature?

Chapter 4 explicitly identifies Sai with the Supreme God, describing Him as the Inner Self who brings joy to the world, the Guru, and the Joy-giving Shankar. The text delves into advanced philosophical concepts to articulate His boundless nature, stating He is eternal, non-dual, and knows no division of place, time, or object. It highlights the inadequacy of human language to capture His essence by mentioning that the four levels of speech—Para, Pashyanti, Madhyama, and Vaikhari—become tired of trying to describe Him. Furthermore, it references the Vedic method of 'Neti-Neti' ('Not this, Not this'), signifying that the Supreme Reality can only be described by negating all finite attributes, as the Vedas themselves failed to define Him directly.