Could you explain the nature of Parabrahman and why we often fail to perceive it correctly, based on Chapter 37?

Chapter 37 describes Parabrahman as the single, all-pervading principle that exists in everything, from the creator Brahma down to a blade of grass, in all moving and non-moving things. This reality is the same here on earth and in the hereafter. The reason we fail to perceive it correctly is due to ignorance. The text clarifies that while Brahman itself is without worldly qualities, it appears to be something else when combined with adjuncts (upadhis). This illusion deludes the soul, causing it to perceive a difference between itself and Brahman, which is the fundamental error that prevents its true realization.