Acharya Prashant explains that duality is the root of illusion, and this illusion arises from the supreme, non-dual reality. He emphasizes that seeing differences and distinctions is a sign of ignorance, whereas a wise person perceives a single underlying element in everything. The speaker highlights that darkness is inherent in light and non-existence is hidden within existence. One who lives in distinctions, being attracted to one thing while avoiding another, remains trapped in suffering and confusion. He asserts that the perception of separate things causes the mind's emotions to fluctuate constantly.