What began as a protest quickly developed into what Luther called a “theology of the cross” (or more accurately, being a theologian of the cross), and eventually emerged as the five Reformation solas. These solas helpfully summarize Luther’s theological contributions. But there’s more. Hymnody, preaching, missions, and even the meaning of our work all received Luther’s attention. As we look back to Luther, we find much that serves us well as we look ahead to the next Reformation.