Commentaries:
Jamieson, Fausset, and Brown
ran and returned—Incessant, restless motion indicates the plenitude of life in these cherubim; so in Revelation 4:8, "they rest not day or night" (Zechariah 4:10).
flash of lightning—rather, as distinct from "lightning" (Ezekiel 1:13), "the meteor flash," or sheet lightning [FAIRBAIRN].
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