Could you provide a summary of why saints take birth on Earth based on the teachings in Chapter 4?

Chapter 4 of the Sai Satcharitra provides a clear reason for the advent of saints. They incarnate when religion is in decay, societal order breaks down, and people lose their way. This happens when individuals disrespect their duties and teachers, when hatred grows, and when people prioritize worldly pleasures over spiritual truth. Saints descend to this mortal world to protect the virtuous, destroy irreligion, and re-establish the system of castes and stages of life. Their purpose, as the chapter explains, is entirely for the sake of others, helping to uplift the distressed and reawaken faith in humanity.