A short story is confined to one mood, to which everything in the story pertains. Characters, setting, time, events, are all subject to the mood. And you can try more ephemeral, more fleeting things in a story - you can work more by suggestion - than in a novel. Less is resolved, more is suggested, perhaps.
Eudora WeltyWhen I was a child and the snow fell, my mother always rushed to the kitchen and made snow ice cream and divinity fudge-egg whites, sugar and pecans, mostly. It was a lark then and I always associate divinity fudge with snowstorms.
Eudora WeltyBut how much better, in any case, to wonder than not to wonder, to dance with astonishment and go spinning in praise, than not to know enough to dance or praise at all; to be blessed with more imagination than you might know at the given moment what to do with than to be cursed with too little to give you -- and other people -- any trouble.
Eudora Welty