When I was growing up, one of my favorite books was Anne of Green Gables by Lucy Maud Montgomery. In one amusing passage, young Anne, by mistake, adds a skin medication instead of vanilla to the cake she is making. Afterward, she exclaims hopefully to her stern-faced guardian, Marilla, “Isn’t it nice to think that tomorrow is a new day with no mistakes in it yet?”

I like that thought: tomorrow is a new day—a new day when we can start afresh. We all make mistakes. But when it comes to sin, God’s forgiveness is what enables us to start each morning with a…