What does Chapter 4 say about the selfless purpose and primary mission of saints when they descend to earth?

According to the teachings in Chapter 4 of the Sai Satcharitra, the incarnation of saints is purely for the sake of others, as they themselves have no self-interest. Their purpose is to protect the humble, poor, and weak, and to destroy irreligion. The chapter explains that saints are naturally liberated but are always ready to uplift the distressed. Their mission is to fill the foundation of Renunciation and build the 'temple of Ultimate Truth,' thereby awakening faith and easily uplifting devotees while performing the work of religion.