How does Chapter 51 differentiate between the destruction of delusion and the attainment of knowledge, using Arjuna as an example?

Chapter 51 provides a nuanced explanation of spiritual progress by focusing on the destruction of delusion over the attainment of knowledge. It references the end of the Bhagavad Gita, where Shri Krishna pointedly asks Arjuna if his delusion (moha) has been destroyed. As the chapter highlights, Krishna did not ask if knowledge had been attained. Arjuna's reply, cited in the text, is "My delusion has vanished to the ends of the earth," not that he had 'attained' knowledge. Chapter 51 clarifies that "delusion (moha) is merely another name for ignorance" and that its complete destruction is the crucial step in spiritual realization, a point understood by those who grasp the Gita's essence.