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.” – John 8:12 (ESV)
If we could travel through time and found ourselves in the past, the time of Genesis 1:1, we would not be able to see anything at all. The earth was formless with nothing but deep darkness covering it. It was the Son of God, Creator of all things* who created light by speaking it into existence and separated the light from the darkness. If we understand this we’ll recognize that Jesus Christ, who spoke the promises in this verse for today, is the one and same Son of God who created all including light for the world. Christ is the Light of the world. God is light, and Christ is the visible image of God. One sun enlightens the whole world; so does one Christ, and there needs to be no more. What a dark dungeon would be the world without our sun! So would life be be without Jesus, by whom light came into the world. Those who follow Christ shall not walk in darkness. We shall are not left without THE TRUTHS necessary to keep us from destructive the path and provide directions in the way necessary to keep them from condemning sin.
*(John 1:1-5; Colossians 1:15-17)