Verse 11.4 presents a stark ontological dichotomy, immediately establishing the core tenet of paramartha yoga: the ultimate reality resides in advaita – non-duality. The assertion that ‘duality is all illusory’ (bhranti bhrantimayam sarvam) is not merely a philosophical preference but a fundamental description of the manifested world as we typically perceive it, a realm constructed through bhranti – illusion. This illusion, this projection of separate self and other, generates the appearance of all existence, a continuous stream of experience predicated on the fallacy of inherent difference. However, the verse powerfully concludes that “in the destruction of illusion, nothing” (bhrantinaashe na kinchan), signaling the transformative power of nashana – the negation of this illusory construction. This isn’t annihilation, but rather a radical unveiling, a recognition that the very basis of experience, the perceived multiplicity, dissolves into the underlying unity, revealing that the cessation of illusion is the cessation of phenomenal existence as it appears to us. This echoes the Upaniṣadic emphasis on neti neti – “not this, not this,” a method of dismantling the conceptual framework through which we grasp reality.