John 8:12, “Again Jesus spoke to them, saying, ‘I am the light of the world. Whoever follows me will not walk in darkness, but will have the light of life.’” This is the second of seven of Jesus’ famous “I am” sayings. The first one was in chapter 6, where he says, “I am the bread of life.” And now he’s revealing himself as the “light of the world”—meaning, he’s the light that illuminates the world. Light shines. It illuminates. It reveals. It helps you to see thin...