Chapter 37 discusses the cycle of worldly existence. What specific belief or ignorance keeps a person bound to the cycle of birth and death?

The text of Chapter 37 clearly states that the root cause of being trapped in the eternal cycle of worldly existence (Samsara) is the ignorance that creates a sense of duality and separation from the ultimate reality. The chapter explains that a person who holds the belief, "Parabrahman is different from me; I am not that, I am something else," is creating a knowledge of difference. It is this perception of being separate from the Divine that subjects the soul to the law of karma, where death follows birth and rebirth follows death in a relentless cycle. The chapter implies that overcoming this delusion of separation is the key to liberation from Samsara.