Based on Chapter 4, what is the nature of saints and what specific actions do they take to fulfill their mission on Earth?

Chapter 4 portrays saints as beings who are "naturally liberated" yet are always prepared to uplift the distressed. Their nature is entirely selfless, with their incarnation being solely for the benefit of others. To fulfill their mission, they take several key actions when religion is in decay. As detailed in this chapter, they work "to protect the system of castes and stages of life, and to destroy irreligion." They also protect the vulnerable—the humble, the poor, and the weak. By performing the work of religion and awakening faith, they restore balance. Chapter 4 states that once their specific work is completed and their mission fulfilled, they conclude their incarnation, highlighting the purposeful and temporary nature of their physical presence on Earth.