What does Chapter 8 say about the real purpose of human life, and how does it contrast humans with animals?

Chapter 8 of the Sai Satcharitra delves into the philosophy of human existence, questioning if life is merely about survival. It states that the true duty and success of human birth is the attainment of the Supreme Self, or Paramatman. The text makes a sharp contrast with animals, asking what separates humans from dogs and pigs if life is only spent on the four activities of eating, sleeping, fear, and mating. As explained in Chapter 8, if nourishing the body and seeking pleasure are the only goals, then human birth is rendered useless, no different from an animal that also fills its belly and reproduces.