Chapter 4 describes saints as being 'naturally liberated.' Given this, what is their ultimate mission on Earth, and how do they accomplish it for the benefit of others?

Chapter 4 clarifies that although saints are already liberated, their incarnation is purely for the sake of others, with no self-interest involved. Their mission is to uplift the distressed and re-establish dharma. The text uses a powerful metaphor, stating that they 'fill the foundation of Renunciation (Nivritti) and build the temple of Ultimate Truth.' As explained in this chapter, they skillfully operate within the frame of Worldly Activity (Pravritti) to easily uplift their devotees, performing the work of religion and awakening faith until their specific mission is fulfilled.