But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin.

 (iv) The darkness stands for the chaos of life without God. God, says Paul, thinking of the first act of creation, commanded his light to shine out of the darkness ( 2 Corinthians 4:6). Without God's light the world is a chaos, in which life has neither order nor sense. 