How does Chapter 4 describe the selfless nature of saints and their work in the world?

In Chapter 4, the nature of saints is portrayed as entirely selfless and dedicated to the welfare of others. The text explicitly states that saints themselves are naturally liberated, yet they are always ready to uplift the distressed. It is made clear that their incarnation is purely for the sake of others and that they have no self-interest in their actions. Their work involves protecting the system of castes and stages of life, destroying irreligion, and shielding the poor and weak. This chapter illustrates that they build a foundation of Renunciation (Nivritti) while simultaneously working within the framework of Worldly Activity (Pravritti) to easily uplift their devotees.