Light has Come to Those in Darkness
After God created all the matter in the universe and it was a dark, surging mass covered in water, the first thing he called into existence to bring order to it all was light. Let there be light, he said. (Genesis 1:3) And there was light. So basic and primary, light. Yet without light, life cannot exist. This is easily demonstrated. Put one of your houseplants in a dark closet for a week and then check on it. It will be dead.