According to the Sai Satcharitra, what is the true purpose of human life, and how does it contrast with a life focused only on basic survival?

Chapter 8 of the Sai Satcharitra delves into the philosophy of human life, arguing that its true purpose is the attainment of the Supreme Self (Paramatman) and the realization of the Eternal. The text poses the question of whether life is merely for being born, growing strong, and breathing. It strongly contrasts this spiritual goal with a life spent only on the four activities of eating, sleeping, fear, and mating. As explained in Chapter 8, if these are the only ends, then human birth is considered useless, and there is little difference between a human and animals like dogs and pigs, which also fulfill these basic functions.