Based on Chapter 51, what is the philosophical distinction made between the 'destruction of delusion' and the 'attainment of knowledge'?

Chapter 51 presents a nuanced philosophical point by analyzing the dialogue between Krishna and Arjuna. The distinction it makes is that the spiritual goal is not an additive process of 'attaining knowledge' but a subtractive one involving the 'destruction of delusion.' The chapter emphasizes that Krishna's question to Arjuna specifically targets the destruction of delusion (moha), which is described as just another word for ignorance. Arjuna's confirmation, "My delusion has vanished," reinforces this. As interpreted in Chapter 51, this implies that knowledge is not something to be acquired from the outside, but is what remains when the veil of ignorance is removed.