What is the distinction between 'Jnana' (knowledge) and 'Avidya' (ignorance) as described in the texts?

According to the teachings in Chapter 50, the distinction is fundamental to one's spiritual state. 'Jnana', or pure knowledge, is the realization of the true self, expressed by the understanding: "I am the Soul, the pure witness; purely enlightened and liberated." It is the recognition that "This Soul is Brahman." In stark contrast, 'Avidya', or ignorance, is described as an attitude of negativity and self-deprecation, encapsulated by the thought, "I am a sinner, unfortunate, luckless." The text from Chapter 50 explicitly calls this mindset the "mine of 'Avidya'" and identifies it as the source from which the state of bondage arises, while 'Jnana' is the key to liberation.