How does Chapter 51 use the dialogue between Krishna and Arjuna to explain the concept of destroying delusion?

Chapter 51 delves into the distinction between destroying delusion and attaining knowledge by referencing the conclusion of the Bhagavad Gita. It highlights that Shri Krishna specifically asked Arjuna if his 'delusion' had been destroyed, not if he had 'attained knowledge.' Arjuna's response, as cited in Chapter 51, was, 'My delusion has vanished.' The chapter explains that delusion (moha) is just another word for ignorance. The essence of this interaction, for those who understand the Gita, is that spiritual progress is primarily about the removal of ignorance, rather than the acquisition of new knowledge, which is the key takeaway presented in this section.