Marina Warner spent years unable to set foot in a Catholic church. “I went to a convent school,” she explains, “but renounced it as a young woman. For a long time it remained too painful. I felt flattened if I tried to go inside a church, sinful, excluded and so wretched, but now all that turmoil has passed. And,” she adds almost conspiratorially, “I find myself quite liking the serenity of it again.”