What does Chapter 4 reveal about the selfless nature and primary mission of saints like Sai Baba?

Chapter 4 of the Sai Satcharitra emphasizes that saints are naturally liberated beings whose incarnation is purely for the benefit of others, with no self-interest involved. Their primary mission is to protect the humble, poor, and weak, and to destroy irreligion. They descend to Earth when people have lost their way, obsessed with lust, hunger, and worldly attachments, thereby missing the chance for self-upliftment. As the text states, saints come to awaken religion and re-establish the system of castes and stages of life. They build a "temple of Ultimate Truth" on a "foundation of Renunciation" to uplift devotees, and once their specific work is fulfilled, they end their incarnation.