How does Chapter 4 reconcile a saint's role in worldly affairs (Pravritti) with spiritual renunciation (Nivritti), and how is Sai Baba depicted in this context?

Chapter 4 of the Shri Sai Satcharitra presents a sophisticated view of a saint's mission, explaining that they bridge the spiritual and material worlds. The text states that saints "fill the foundation of Renunciation (Nivritti)" while building the "temple of Ultimate Truth," and simultaneously work "around the frame of Worldly Activity (Pravritti)" to uplift devotees. The chapter then elevates this concept by identifying Sai Baba as the Supreme Divinity itself. He is described as the Guru and God, an eternal, non-dual being beyond all limitations of time and place. This divinity is so profound that the Vedas could only describe Him through negation, as "Not this, Not this" (Neti-Neti), positioning the saint's work as a manifestation of this ultimate, indescribable reality.