A woman complained to her pastor that she’d noticed a lot of repetition in his sermons. “Why do you do that?” she queried. The preacher replied, “People forget.”

There are lots of reasons we forget—the passage of time, growing older, or just being too busy. We forget passwords, names of people we’ve known for years, or even where we parked our car. My husband says, “There’s only so much I can fit in my brain. I have to delete something before I can remember something new.”

The preacher was right. People forget. So we often need reminders to help us remember what…