John teaches through the second of four parables in Mark 4:21-25. Jesus is the light of the world. He came to transfer us from the dominion of darkness into His Kingdom of marvelous light. He is the lamp on a stand that shines His light into the hearts of men. Therefore, as Jesus exhorts us to do, we are to pay close attention to what He has to say. Jesus came and made manifest the Kingdom of God, set captives free, and to reside within us so that we to can shine His light in the world.