You might say—many commentators have said—that with the quick Vatican smackdown of Cardinal Sarah's proposal for ad orientem worship, Rome has spoken and the case is closed. I disagree. On the contrary, Cardinal Sarah has reopened a much-needed discussion about how to increase reverence in the liturgy. His address to a conference in London caused what that city's Catholic Herald is describing in this week's cover headline as A liturgical earthquake. Ten days ago no one was talking about celebrating Mass ad orientem. Now that option is being widely discussed, even in secular media outlets. Cardinal Sarah was not issuing...