Here's a thread to share or discuss the best short stories you know of. Looking forward to reading something that has had a big impact on you or that you love for any reason.
Edit to say: thank you everyone for your recommendations, I'll be reading them!
The Electric Ant, Progeny, and The Exit Door Leads In by Philip K. Dick are probably three of his best short works.
In typical fashion for pkd they are mostly about perception and reality I guess. But perhaps why these three stick out to me is in how the central focus of the three is how we are programed by our environment to be who we are.