According to Chapter 8, what distinguishes human life from animal existence, and what is its ultimate purpose?

Chapter 8 of the Sai Satcharitra presents a deep philosophical argument about the significance of human birth. It posits that if a life is spent only on the basic activities of eating, sleeping, fear, and mating, then there is no meaningful difference between a human and an animal like a dog or a pig. The text pointedly asks wherein the greatness of the human body lies if it is used for the same ends. As this chapter explains, the true and unique purpose of human life, which elevates it above mere animal existence, is the attainment of the Supreme Self (Paramatman) and the realization of the Eternal. This spiritual pursuit is what makes human birth a true success.