What is the primary theme discussed in Chapter 4 of Sai Satcharitra concerning the arrival of saints?

Chapter 4 of the Sai Satcharitra is primarily dedicated to explaining the reasons why saints take an incarnation on Earth. It details the conditions of societal and religious decay that necessitate their arrival. According to the text, when people turn away from the ultimate goal (Paramartha) and become obsessed with worldly happiness from wealth, status, and family, saints descend to reawaken religion. As Chapter 4 clarifies, their incarnation is not for any self-interest, as they are already liberated, but purely for the sake of uplifting the distressed and protecting the humble and weak.