What are the primary reasons given in Chapter 4 of the Sai Satcharitra for why saints take birth in the world of mortals?

Chapter 4 of the Sai Satcharitra explains that saints incarnate when there is a significant decay of religion and people lose their way. This happens when people consider worldly things like wealth, status, and family as the only source of happiness, turning away from the ultimate spiritual goal, or Paramartha. As detailed in this chapter, saints descend to this earth to awaken religion, protect the humble and the weak, and destroy irreligion, providing a path for self-upliftment for those who have lost their chance.