The human species has found a lot of ways to deal with their trauma, some more healthy than others, but there’s no denying that the scorch of unfathomable hardship often drives people into the soothing structure of religion, where suffering is part of god’s plan and salvation holds the promise of an eventual happily ever after. In other words: “Never waste your pain.” That four-word motto is a repeated anthem for Maud (Morfydd Clark), the recently converted nurse at the heart of A24’s most recent horror acquisition, Saint Maud. The debut feature from writer/director Rose …