What is the significance of the 'Avagraha' in the Bhagavad Gita verse mentioned in the Sai Satcharita, and how does it relate to knowledge and ignorance?

According to Chapter 50, the mention of the Bhagavad Gita verse "Tadviddhi pranipatena pariprasnena sevaya..." highlights a subtle but important concept. The text explains that an 'Avagraha' appearing before the word 'Jnana' (knowledge) in the third line of this verse can emerge as an indicator of 'Ajnana' (ignorance). While the word 'Jnana' on its own is universally accepted as leading to liberation, the introduction of this linguistic symbol points to its opposite. This serves as a discourse on ignorance, emphasizing that one must first understand and remove ignorance to purify the mind, which then allows for infinite knowledge and non-dual Samadhi to be attained, as detailed in Chapter 50.