The knowledge of Brahman remained within Brahman's own realm, and not even a trace of it manifested within oneself.

This couplet beautifully conveys that the true knowledge of Brahman, or the Ultimate Reality, is intrinsically tied to Brahman itself. It means that Brahma-vidya isn't something separate that you can simply 'get' or 'take a little bit of' and keep within yourself. Instead, this profound wisdom serves to reveal Brahman, pointing directly to the divine source. To truly understand it, you cannot merely possess it externally; you must realize it by becoming one with that ultimate reality. It highlights that spiritual enlightenment is about an intrinsic state of being, not an external acquisition.