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

Chapter 8 explains that the true purpose and duty of human birth is the attainment of the Supreme Self (Paramatman). The text poignantly asks what dogs and pigs lack if life is merely about survival, filling the belly, and reproduction. It argues that if a human life is wasted only on the four activities of eating, sleeping, fear, and mating, there is no meaningful difference between a human and a dog. As Chapter 8 states, a human being is meant to be free and fearless, and the realization of the Eternal is the only true measure of a successful life, distinguishing us from other creatures.