How does Chapter 51 draw a parallel with the Bhagavad Gita to explain the concept of 'delusion'?

Chapter 51 makes a direct connection to the Bhagavad Gita to illustrate the nature of spiritual progress. It recalls the end of the eighteenth chapter, where Shri Krishna asks Arjuna if his delusion has been destroyed, not if knowledge has been attained. Chapter 51 highlights Arjuna's response: "My delusion has vanished." The text emphasizes that Arjuna did not claim to have 'attained' knowledge, but rather that his delusion, which is described as just another name for ignorance, was destroyed. This parallel is used to underscore that the removal of 'moha' (delusion) is the key outcome of spiritual discourse, a point central to the teachings discussed.