Anthropologist Anthony Graesch says that the outside of a refrigerator reveals what’s important to people. During a research study of families in Los Angeles, Graesch and his colleagues noted an average of 52 items posted on the fridge—including school schedules, family photos, children’s drawings and magnets. Graesch calls the refrigerator “a repository of family memory.”

The Lord may use a tangible item like a photo, keepsake, or Scripture verse to remind us of His faithfulness and the call to obey His Word. When Moses addressed the Israelites just before they entered the land of Canaan, he urged them to keep all…