The Apostle John wrote of the true Light that enlightens every person, and through whom the world was made (John 1:9-10). Later in the book, Jesus identified Himself as the light (John 9:5), something God did throughout the Old Testament (Psalm 104:2). Christ is the light of God made tangible for His people to see and to follow. Paul discussed this idea in his letter to the Ephesians, calling believers “Light” and telling us to “walk as children of Light” (Ephesians 5:8). In other words, Paul wanted us to imitate God by imitating God's Son, a point Paul elaborated further in this passage.