How does Chapter 4 of the Sai Satcharitra portray the intrinsic nature and mission of saints?

According to Chapter 4, saints are depicted as naturally liberated beings whose incarnation is purely for the sake of others, as they have no self-interest. They are always ready to uplift the distressed. Their mission involves several key actions: they protect the system of castes and stages of life, destroy irreligion, and safeguard the poor and weak. As described in this chapter, saints build the 'temple of Ultimate Truth' upon the foundation of Renunciation and guide devotees through worldly activities. Once their specific work of re-establishing religion and faith is complete, they conclude their incarnation.