What does Chapter 8 teach about the purpose of being human, especially when compared to animals?

According to the philosophical discussion in Chapter 8, the true purpose of human life is not merely to survive but to achieve the attainment of the Supreme Self (Paramatman). The text explicitly questions a life spent only on basic activities, asking what differentiates a human from a dog or a pig if life is reduced to eating, sleeping, fear, and mating. The chapter argues that if nourishing the body and sexual pleasure are the only goals, then human birth is rendered useless. This distinction highlights that humans have a higher spiritual calling beyond mere biological existence.