Can you describe the nature of the Self as being beyond 'existence' and 'non-existence' based on the provided text?

The teachings in Chapter 37 present a profound concept of the Self. It is explained that everything visible and perceivable by the intellect should be considered non-existent, much like a dream that vanishes upon waking. The true essence, or the Self, exists in a realm where the concepts of 'existence' or 'non-existence' do not apply. This Self is described as being free from all specific qualities, beyond old age, birth, and death. It is eternal, ancient, indivisible, and changeless, like the all-pervading sky. The text cautions against mistaking this 'Unqualified' (Nirguna) nature for being a void or non-existent, urging that this ignorance must be dispelled through knowledge.