Borges worked as a librarian at the Buenos Aires Municipal Library for nine years. He catalogued books, sat at a desk, earned a modest salary. During his lunch breaks and on the bus ride home, he wrote short stories. The stories he produced in those stolen minutes became some of the most influential fiction of the twentieth century. "The Garden of Forking Paths," "The Library of Babel," "Tlön, Uqbar, Orbis Tertius." None longer than a few thousand words. All containing more ideas than most 400-page novels.
There's something about the short story form that thrives on constraint. Borges didn't write novels. He said he was too lazy, which was probably a joke, or probably half a joke, but the result is that every idea he had went into a form that demanded compression and the willingness to let a reader fill in what you left out. His stories read like blueprints for entire civilizations, condensed into the space of a long lunch.
If you're trying to learn how to write a short story, that tension between vastness and brevity is where the form lives. You don't have three hundred pages. You have ten. Every sentence has to carry more than one thing at once, has to do the work of description and characterization and mood simultaneously, or it doesn't belong.
Compression changes how you think about every sentence
Grace Paley could open a story the way most writers can't close one. From "A Conversation with My Father": "My father is eighty-six years old and in bed. His heart, that bloody motor, is equally old and will not do certain jobs any more." Two sentences. A character, a relationship, a physical setting, a tone that's both clinical and tender, and a conflict that won't resolve. That's a different kind of thinking from what most writing advice prepares you for.
Short story writing forces you to treat every sentence as a container for multiple things. Paley's Bronx mothers, her neighborhood voices, her political asides that land in the middle of domestic scenes and vanish before you've fully registered them. She was listening to how people actually talk, and real speech is already compressed. Paley wrote fiction the way her characters spoke, trusting the reader to keep up.
This is a learnable thing. Take any paragraph you've written and ask: what is this sentence doing? If it only describes the room or only moves the plot forward, it probably needs to go. In a short story, a sentence that describes the room also needs to tell you something about the character standing in it.
The best short stories contain a single moment that holds everything else
Tobias Wolff's "Bullet in the Brain" is about a book critic named Anders who gets shot during a bank robbery. Three pages. Wolff spends the first page and a half on the robbery, on Anders being irritating and superior. Then the bullet enters Anders' skull, and Wolff slows time to a crawl.
In the space between the bullet entering and Anders dying, Wolff gives us a single childhood memory. A summer baseball game, a kid from Mississippi who says "Short's the best position they is." Anders hears that sentence and is delighted by the music of the wrong grammar, by the sound of language before he learned to judge it. That's what his brain chooses in the last fraction of a second. A sentence a kid said on a baseball diamond decades ago.
The story works because Wolff knew, before he started writing, what that final memory would be. Everything else exists to deliver you to that moment. The robbery, the annoyance, the gunshot. They're structure. The story is the memory. When you're figuring out your own short story, this is worth sitting with: what's the one moment that contains the whole thing? You might write three drafts before you realize the scene you thought was the climax is scaffolding, and the real story is hiding in a detail you almost cut.