Author's Note: There's no point in asking me for just 100 words, is there? When I had this idea, I thought, Yes! That'll be 100 words, that will. Maybe next week, eh? I'm surprised I haven't been kicked out yet. Anyway, something a little different...
How Do Angels See?
"How do angels see?" Dean asks him one night in an anonymous motel room, slumped on the couch and a little drunk. Sam's fetching food so it's just the two of them. Castiel likes to keep watch.
Castiel thinks; tries to come up with an explanation that a human could comprehend.
Colours are saturated, trees are a brighter green. There are darker corners too, something Castiel saw before but didn't dwell on. His world was ordered back then; good and evil separate. Once he met Dean Winchester that changed. Now everything's so... indistinct.
Humans are pulses of light; the brighter the soul the better the person. When he first saw Dean, Castiel was awed by the strength of his soul, the sense of righteousness and duty. Still bright, even after years in the Pit.
He opens his mouth to tell Dean that, but he's fallen asleep, the empty beer bottle slipping from his hand as he snores gently. Castiel continues his vigil until Sam returns, never answers Dean's question.
Years later in the endless forest of Purgatory, on a day that will never end, when everything that surrounds him roils his grace, Castiel can't help himself; he follows the light.
The End