What is the primary cause of being trapped in the cycle of Samsara (birth and death) as explained in Chapter 37?

The primary cause of being trapped in the cycle of Samsara, as detailed in Chapter 37, is the delusion born from ignorance. This manifests as the perception of duality and separateness from the divine. The text states that when a soul, deluded by ignorance, believes 'Parabrahman is different from me; I am not that, I am something else,' this knowledge of difference subjects them to the eternal cycle. As the chapter explains, 'Death follows birth, and rebirth follows death; this cycle of worldly existence (Samsara) turns eternally behind him.' Overcoming this delusion is key to liberation.