Can you provide a summary of the core teachings presented in Chapter 4 of the Shri Sai Satcharitra?

Chapter 4 of the Shri Sai Satcharitra primarily teaches why saints take birth in the mortal world. It posits that they incarnate during times of great spiritual and moral decline to restore righteousness. The chapter lists specific signs of this decay, such as disrespect for tradition and a focus on materialism over spirituality. A core teaching from Chapter 4 is that a saint's work is entirely selfless, aimed at protecting the weak and uplifting the distressed without any personal motive. The chapter concludes by identifying Sai Baba as the Supreme God, a being beyond comprehension or description, who came to reawaken faith and guide humanity.