At the end of one school semester, my wife and I picked up our daughter from her school 100 kilometers (60 miles) away. On our way back home we detoured to a nearby beach resort for snacks. While enjoying our time there, we watched the boats at the seashore. Usually they are anchored to prevent them from drifting away, but I noticed one boat drifting unhindered among the others—slowly and steadily making its way out to sea.

As we drove home, I reflected on the timely caution given to believers in the book of Hebrews: “We must pay the most careful…