Can you explain the philosophical discussion about delusion and knowledge in Chapter 51, specifically its connection to the Bhagavad Gita?

Chapter 51 delves into a nuanced philosophical point by referencing the Bhagavad Gita. It recalls the previous chapter's theme of destroying ignorance and explains the verse "Tadviddhi Pranipatena." The text highlights Shri Krishna's question to Arjuna at the end of the Gita, asking if his delusion was destroyed, not if he had attained knowledge. As Chapter 51 clarifies, Arjuna confirmed his delusion had vanished, emphasizing that the destruction of delusion, or 'moha,' is the key outcome. The chapter states that 'delusion' is merely another name for ignorance, underscoring that their essence is the same, a core realization for those who understand the Gita's meaning.