D&C 6:21 · John 1:5
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Divergences: the revelation makes the speaker the light ('I am the light which shineth'); the second verb's tense differs ('comprehendeth' / 'comprehended'). D&C 10:58 repeats the revelation's form exactly; D&C 45:7 carries a further variant, 'a light that shineth in darkness and the darkness comprehendeth it not'.