What does Chapter 37 identify as the primary reason a person remains trapped in the cycle of worldly existence (Samsara)?

Chapter 37 explains that the root cause of being trapped in the cycle of worldly existence, or Samsara, is a deluded understanding of one's true nature. The text states that when a person holds the knowledge of difference, thinking, "Parabrahman is different from me; I am not that, I am something else," they become subject to death. This ignorance, where the divine principle appears separate from the self, leads to an eternal cycle where death follows birth and rebirth follows death. As Chapter 37 clarifies, this cycle of Samsara turns eternally behind one who is deluded by such ignorance.