Religion is kind of an under-the-radar theme in "Everything That Rises Must Converge," but once you start to notice it—it's everywhere. But O'Connor, who was a devout Roman Catholic, doesn't hit us over the head. She interweaves religious references to create a tone of mystery that brings us into a sacred space. She's a guide rather than a preacher—and, even though religion saturates the pages, it isn't hitting us over the head with a bible.
In "Everything That Rises Must Converge" both Julian and his mother believe they are on the righteous path.
In terms of the story, Julian is a sinner and his mother is a saint.