How does Chapter 4 describe the selfless nature and primary purpose of a saint's life on Earth?

Chapter 4 of the Shri Sai Satcharitra emphasizes that saints are inherently selfless beings. The text explicitly states, "Their incarnation is purely for the sake of others; they have no self-interest." Saints are described as naturally liberated souls who are always ready to uplift the distressed, the poor, and the weak. Their primary purpose in descending to Earth is to protect the system of castes and stages of life, destroy irreligion, and reawaken faith. This chapter makes it clear that their entire mission is an act of compassion to guide humanity back towards the ultimate goal, or Paramartha.