The Upanishads, Part 2 (SBE15)
Chapters
Brihadaranyaka-Upanishad: Fifth Adhyaya: Seventh Brahmana

SEVENTH BRAHMANA.

1. They say that lightning is Brahman, because lightning (vidyut) is called so from cutting off (vidanat) . Whosoever knows this, that lightning is Brahman, him (that Brahman) cuts off from evil, for lightning indeed is Brahman.

Footnotes

^192:3 From do, avakhandane, to cut; the lightning cutting through the darkness of the clouds, as Brahman, when known, cuts through the darkness of ignorance.