What are the main teachings and stories in Chapter 4 of Sai Satcharitra?

Chapter 4 of the Sai Satcharitra explains the fundamental reasons for a saint's incarnation on Earth. It details the societal and religious decay that necessitates their arrival, such as when people disrespect religious teachers, ignore proper conduct, and become consumed by worldly desires. The chapter describes the nature of saints as being naturally liberated, incarnating purely for the benefit of others to protect the humble and re-establish religion. As explained in this chapter, their mission is to build a 'temple of Ultimate Truth' and awaken faith, and once their work is done, they end their incarnation. Finally, it elevates Sai to the status of the Supreme Divinity, the non-dual reality beyond all description.