What are the core teachings presented in Chapter 4 of Sai Satcharitra about why saints appear on Earth and the divine nature of Sai?

Chapter 4 of Sai Satcharitra explains that saints incarnate during times of significant social and religious decay. This happens when people forsake their duties, religious leaders are disrespected, and worldly attachments to wealth and family are prioritized over the ultimate spiritual goal. According to this chapter, saints are naturally liberated beings who descend purely for the benefit of others, aiming to protect the weak, destroy irreligion, and reawaken faith. The chapter then elevates Sai to the status of the Supreme Divinity, describing Him as the Inner Self, the Guru, and Shankar, an eternal and non-dual being who is beyond all description, even by the Vedas.