How does Chapter 37 explain the concept of Brahman and the illusion created by ignorance?

Chapter 37 explains that a single divine principle, Brahman, pervades everything in existence, from the creator Brahma down to the smallest blade of grass, in all moving and non-moving things. It clarifies that this principle is the same here on earth as it is in any other realm. However, the chapter states that when this quality-less Brahman is combined with adjuncts (upadhis), a soul deluded by ignorance perceives it as something other than Brahman. This ignorance leads to the false belief that 'Parabrahman is different from me,' which Chapter 37 identifies as the root of suffering and the cycle of rebirth.