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

Chapter 8 of the Sai Satcharitra posits that the true purpose of human life is the attainment of the Supreme Self, or Paramatman. The text strongly argues against a life focused solely on survival, asking what separates humans from animals like dogs and pigs if their activities are limited to eating, sleeping, fear, and mating. As explained within this chapter, if nourishing the body and seeking sensual pleasure are the only aims, then the human birth is rendered useless. True human greatness, it suggests, lies in using our freedom and wisdom to realize the Eternal, a potential that distinguishes us from other beings who simply fill their bellies and reproduce.