The Upanishads, Part 2 (SBE15), by Max Müller, , at sacred-texts.com
1. They say that lightning is Brahman, because lightning (vidyut) is called so from cutting off (vidânât) 3. Whosoever knows this, that lightning is Brahman, him (that Brahman) cuts off from evil, for lightning indeed is Brahman.
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.