The narrative half of the Kena Upaniṣad. The gods win a battle and think they did it themselves. Brahman appears before them and none can recognise it — until Indra approaches Umā (wisdom itself), who names it.
The gods defeat the asuras in battle. They are elated — and they make a mistake. They think they won by their own power. The very feeling of 'we did this' is the error the story is diagnosing.
Brahman appears before them as a yakṣa — an unrecognised presence. The gods send Agni (fire) to find out what it is. Agni approaches. The yakṣa asks: what can you do? Agni says: I can burn everything on earth. The yakṣa places a blade of grass before him. Agni cannot burn it. He returns ashamed.
They send Vāyu (wind). Vāyu says: I can blow away everything on earth. The yakṣa places the same blade of grass. Vāyu cannot move it. He returns ashamed.
Indra is sent. He approaches. The yakṣa disappears. In its place Indra finds a woman of great radiance — Umā Haimavatī, wisdom herself. He asks her: what was that yakṣa? She answers: that was Brahman. In Brahman's victory you were celebrating — not your own.
The story's point is precise. Agni's power to burn is real. Vāyu's power to blow is real. But neither is the ultimate power — neither can operate independently of the consciousness that underlies all natural force. The blade of grass placed by Brahman is not harder than ordinary grass. It is that in which Agni operates — the ground itself cannot be burned by the fire it supports. The gods' powers are borrowed powers. They did not recognise from whom they borrowed.
The Kena's narrative section (3–4) is the pedagogical application of the argument made in the verse section (1–2). The verse section establishes that Brahman is the ground of all faculties — the mind of the mind, the eye of the eye. The narrative section dramatises what happens when the faculties forget this: they claim the ground's action as their own.
The blade of grass (tṛṇam) is the Kena's most famous image. It is deliberately the most ordinary, the least impressive, of all objects. The point: Brahman's power is not demonstrated in overwhelming displays. It is demonstrated by the inability of the most powerful cosmic forces to operate on the most trivial object without the permission of the underlying consciousness. Agni cannot burn a blade of grass that Brahman holds. Not because Brahman is more powerful in the same sense that fire is powerful — but because fire's power is itself borrowed from the consciousness it appears within.
Umā Haimavatī's appearance is significant. She is not a secondary figure — she is the one who names Brahman when Indra cannot. The tradition identifies her with wisdom (vidyā) itself. The gods could not recognise Brahman directly; Brahman is not an object that can be recognised by the same faculties whose ground it is. Wisdom — the faculty of discrimination that has already understood the relationship between power and its source — names it correctly.
Śaṅkara's commentary on the Indra-Umā episode focuses on Indra's partial success: he approaches Brahman (unlike Agni and Vāyu who retreat ashamed), and he receives the answer from Umā. This sequence is significant pedagogically. Indra's approach is an act of genuine inquiry rather than a demonstration of power — he no longer tries to show what he can do. His meeting with Umā is thus possible: he arrives in the right disposition. The teaching is that recognition of Brahman requires not the deployment of power (the gods' initial approach) but the relinquishment of the claim to power — the recognition that the faculty one deploys is not one's own but borrowed. This is the practical teaching the Kena has been building toward: the way to recognise the ground of all powers is to stop claiming those powers as independently one's own. When the claim of independent agency is relinquished, what remains is the recognition of Brahman.