Can you explain the connection between duality, ignorance, and fear as described in the sacred texts?

Chapter 37 reveals a deep connection between these concepts, stating that where there is an obsession with duality, fear inevitably enters. This perception of manifoldness, or difference, is established by ignorance (Avidya), which is described as the root cause of all worldly worry and suffering. To counter this, one should acquire knowledge (Vidya) from the scriptures and the Guru. By removing ignorance, the perception of manifoldness disappears, and the cycle of birth and death ceases. Therefore, to be free from fear, one must serve the non-distinguished, non-dual state where fear cannot exist.