What distinction does Chapter 51 draw between 'attaining knowledge' and the 'destruction of delusion' through the example of Arjuna?

Chapter 51 makes a nuanced but critical distinction by analyzing the final exchange between Shri Krishna and Arjuna in the Bhagavad Gita. The chapter points out that Krishna's specific question to Arjuna was, "has your delusion been destroyed?" not whether knowledge had been attained. Arjuna's reply, "My delusion has vanished to the ends of the earth," reinforces this focus. As explained in Chapter 51, he did not claim to have 'attained' knowledge. The text elaborates that delusion (moha) and ignorance are synonymous, meaning the essence of the Gita's teaching is that the destruction of this ignorance is the true goal, rather than the accumulation of something new called knowledge.