In the middle '50s I read a P. K. Dick short story that's really nothing at all like the ones he's most famous for. But that one stuck with me for 50 years or so before I found the magazine it was in and was able to read it again.
The Writer's Almanac from American Public Media: "It's the birthday of Philip K. Dick, born in Chicago (1928), who began to suffer from visions and hallucinations in the 1950s. He once thought he saw a face in the sky, which he described as 'a vast visage of evil with empty slots for eyes, metal and cruel, and worst of all, it was God.' He wasn't sure if his visions were authentic or if they were symptoms of mental illness, and he was fascinated that he could no longer tell what was real and what wasn't. He started writing a series of increasingly strange novels about the nature of reality that have since become science fiction classics, including The Man in the High Castle (1962), Do Androids Dream of Electric Sheep? (1968), and A Scanner Darkly (1977).
Philip K. Dick said, 'Insanity is sometimes an appropriate response to reality.'"