When two firefighters, weary and sooty, stopped at a restaurant for breakfast, the waitress recognized the men from the news and realized they’d spent the night battling a warehouse fire. To show her appreciation, she wrote a note on their bill, “Your breakfast is on me today. Thank you . . . for serving others and for running into the places everyone else runs away from. . . . Fueled by fire and driven by courage, what an example you are.”

In the Old Testament, we see an example of courage in the actions of three young men: Shadrach, Meshach, and…