Can you summarize the main points from Chapter 4 of the Sai Satcharitra regarding why saints appear on Earth?

Chapter 4 of the Sai Satcharitra explains that saints incarnate on earth during times of significant religious and social decay. This occurs when people lose respect for religious teachings, when sectarian hatred grows, and when individuals become obsessed with worldly happiness like wealth and status, turning away from the ultimate spiritual goal. As detailed in this chapter, saints descend to protect the humble and weak, destroy irreligion, and reawaken faith. Their incarnation is described as being purely for the sake of others, as they are already liberated beings with no self-interest, and they work to uplift their devotees and restore the path of religion.