26 Monkeys, Also The Abyss

This story seems to be an almost perfect expression of zen despite not having anything to do with zen.

Many short stories struggle with their length, not knowing how to pack in what they want to do or not having enough despite being short. This is the length it needs to be and no more. And the writing is extremely considered, every sentence is on purpose in a way that is unusual even for professional writers.

You can find it legitimately for free off SF magazine websites so don't wait, just go read it.