What does Chapter 4 of the Sai Satcharitra say about the selfless nature of a saint's incarnation and their core mission?

Chapter 4 explicitly states that saints are naturally liberated beings who incarnate on Earth for reasons entirely outside of their own self-interest. Their incarnation is described as being "purely for the sake of others." The primary purpose of their descent into the mortal world, as detailed in this chapter, is to uplift the distressed, protect the humble, the poor, and the weak, and to destroy irreligion. Their core mission is to reawaken faith, restore the proper systems of life, and once that specific work is fulfilled, they end their incarnation, having completed their selfless task.