Chapter 51 distinguishes between 'attaining knowledge' and the 'destruction of delusion.' Based on the text, can you elaborate on the significance of this distinction?

Chapter 51 presents a sophisticated spiritual concept by analyzing the dialogue between Arjuna and Krishna. The significance of distinguishing between 'attaining knowledge' and the 'destruction of delusion' is central to its argument. As explained within Chapter 51, Arjuna's statement that his "delusion has vanished" rather than "I have attained knowledge" implies that enlightenment is a process of subtraction, not addition. It suggests that one's true, knowledgeable self is already present and is merely obscured by the veil of delusion (moha), which the chapter equates with ignorance. Therefore, the spiritual goal is not to gain something external but to remove the internal obstruction, allowing inherent wisdom to manifest.