Can you explain the roles of 'Pravritti' and 'Nivritti' in a saint's mission, as described in Chapter 4?

Chapter 4 explains how saints skillfully navigate the paths of 'Pravritti' (Worldly Activity) and 'Nivritti' (Renunciation) to fulfill their purpose. The chapter states that saints "fill the foundation of Renunciation (Nivritti) and build the temple of Ultimate Truth," indicating that their own being is rooted in detachment and spiritual truth. However, it also clarifies that "Around the frame of Worldly Activity (Pravritti), they easily uplift the devotees." This means that while they are personally detached, they operate within the worldly sphere to guide and help people engaged in daily life. This dual approach, as detailed in Chapter 4, allows them to connect with and elevate devotees without requiring them to completely abandon their worldly duties.