Flannery O'Connor wrote "Revelation" in 1964 while she was in the hospital being treated for lupus, just a few months before her death in August 1964 at the age of 39. "Revelation" was published posthumously in 1965, along with several other stories that O'Connor had written in the final
years of her life, in a collection called "Everything That Rises Must Converge." "Revelation" is one of her best-known works, and it explores themes of faith, redemption, and the human condition.
For further reflection you might wish to watch some discussions about this story.