According to Chapter 8, what is the real purpose of human life, and how is it different from just being an animal?

Chapter 8 of the Sai Satcharitra posits that the true purpose of human life is the attainment of the Supreme Self (Paramatman) and the realization of the Eternal. The text argues that if life is spent only on the four activities of eating, sleeping, fear, and mating, then there is no difference between a human and an animal like a dog or pig. As described in Chapter 8, dogs and pigs also fill their bellies and reproduce. The greatness of human birth lies in our unique capacity for self-realization, as a human being is described as free, fearless, and independent, and achieving this spiritual goal is the true success of our existence.