According to Chapter 8, what distinguishes human life from that of animals, and what is its true purpose?

Chapter 8 presents a profound philosophy on the purpose of human life by contrasting it with animal existence. The text argues that if life is merely about basic activities like eating, sleeping, fear, and mating, then there is no difference between a human and a dog or a pig. As detailed in the chapter, dogs also fill their bellies and reproduce. The true greatness of the human body and the purpose of human birth is the attainment of the Supreme Self (Paramatman). The chapter posits that a human being is meant to be free, fearless, and independent, and the true success of this life is the realization of the Eternal. Without pursuing this higher goal, a human birth is considered useless.