At the memorial service for my friend’s dad, someone said to her, “Until I met your father, I didn’t know a person could have fun while helping others.” Her dad contributed his part in helping to build the kingdom of God through serving people, laughing and loving, and meeting strangers who became friends. When he died, he left a legacy of love. In contrast, my friend’s aunt—her father’s older sister—viewed her possessions as her legacy, spending her latter years fretting about who would protect her heirlooms and rare books.

In His teaching and by His example, Jesus warned His followers to…