What is the consequence of seeing the world through the lens of duality, and how can a Guru's teachings help?

According to the teachings in Chapter 14, viewing the world through duality—the intellect that establishes a difference between 'I' and 'others'—is described as pure ignorance. This mindset of manifoldness is the direct cause of the cycle of birth and death. The text states that even a small trace of this sense of difference can create a 'mine of non-unity.' A Guru's teachings are essential for overcoming this state. As mentioned in Chapter 14, it is through the Guru's guidance that the mind is purified, leading to the attainment of one's true, non-dual nature and an escape from the suffering caused by delusion.