What philosophical argument does Chapter 8 of Sai Satcharitra make about the purpose of human life?

Chapter 8 of the Sai Satcharitra presents a profound philosophical argument about the true purpose of human existence. It posits that a life spent merely on basic survival instincts like eating, sleeping, and procreation is essentially wasted and no different from the life of an animal, such as a dog or a pig. The text explicitly states that if these activities are the sole focus, then "this human birth is useless." According to the teachings in this chapter, the unique and true duty of being born human is the pursuit and attainment of the Supreme Self, or Paramatman. This realization of the Eternal is described as the ultimate success of birth, distinguishing humans from all other creatures and even inanimate objects.