How does the text define 'Vidya' (knowledge) versus 'Avidya' (ignorance) in terms of a person's inner attitude?

Chapter 50 draws a sharp distinction between the attitudes that constitute knowledge and ignorance. True knowledge, or 'Vidya,' is defined by the eternal pulse of 'I am Brahman' and the understanding that 'This Soul is Brahman.' It is the realization of being the pure, enlightened, and liberated Soul, the treasure of 'Consciousness is Bliss.' In stark contrast, ignorance, or 'Avidya,' is described as a mine of negative self-perception. The attitude 'I am a sinner, unfortunate, luckless' is the very essence of 'Avidya,' which leads to the state of bondage, while 'Vidya' leads to liberation.