According to Chapter 8, what is the true purpose of human life, and how is it contrasted with a meaningless existence?

Chapter 8 of the Sai Satcharitra posits that the true duty and success of human birth is the attainment of the Supreme Self (Paramatman). The text pointedly asks if life's purpose is merely to be born, grow strong, and live a long time. It argues that a life wasted on just the four activities of eating, sleeping, fear, and mating is useless, drawing a comparison to dogs and pigs who also perform these functions. As described in Chapter 8, if nourishing the body and seeking pleasure are the only goals, then human birth is no different from animal existence, and the unique potential of being human is wasted.