According to Chapter 8, what is the philosophical argument regarding the purpose of human life versus mere existence?

Chapter 8 presents a compelling philosophical argument that the true purpose of human life is the attainment of the Supreme Self (Paramatman). The text strongly critiques a life spent merely on survival and sensory pleasure, equating it to the existence of animals like dogs and pigs. It questions the value of human birth if it is only used for the four activities of eating, sleeping, fear, and mating. As explained in Chapter 8, what elevates humanity is the freedom and independence to pursue self-realization. The chapter states that knowing our origin and purpose is the mark of proficiency; otherwise, life is just exhaustion.