According to Chapter 8 of Sai Satcharitra, what is the true purpose of human life, and how is it distinguished from animal existence?

Chapter 8 of the Sai Satcharitra delves into the philosophy of human life, questioning if its purpose is merely to be born, grow, and live a long time. The text asserts that the true duty of human birth is the attainment of the Supreme Self (Paramatman). It draws a stark contrast between humans and animals like dogs and pigs, stating that if life is only about nourishing the body, sleeping, and procreation, then the human birth is wasted. The chapter challenges the reader to consider what separates humans from dogs, which also fill their bellies and reproduce, concluding that the realization of the Eternal is the true measure of a successful and meaningful human life.