In the context of chapter 15, this verse strips away the last possibility of a practice aimed at the Self. The identity of the Self with formless, guṇa-less Brahman is so absolute that nothing remains to be known, renounced, accepted, or rejected. The very structure of seeking collapses, because the seeker is Brahman. This is not nihilism but the fullness of non-dual recognition, where the mind’s restless movement simply has no object.