As inhabitants of the 21st century, we tend to think that our style of anything—fashion, thought, language, music—is the best that things have ever been. We’ll listen to songs from the past with a grin of nostalgia. We’ll look at clothing from the past with a grimace of how-could-we. And while we know that the treasures of Catholic spirituality might be relevant to us today, we often get stuck precisely on their style.No one talks the way people used to, and no one writes...