God is light; in him there is no darkness at all. 1 John 1:5
Your word is a lamp unto my feet and a light to my path. Psalm 119:105God is light. The beginning of creation, the most beautiful, the most needful. It allows us to see, to recognize. On a path, light does more than show the way. More than that, it shows safety, shows danger. Still more: light causes some of the dangerous things to flee.
Light shows us other things in their beauty. And more: It increases their beauty. Consider the drop of water caught in the light, or the cloud caught in the light. The light makes other things more beautiful. Consider the endless cycle of beauty by which God has marked each day: there was evening, and there was morning, each new day. The days are set apart not just by the changing of the light or the clocks, but by fresh displays of beauty. Consider an ocean or lake with the light shimmering on it. For things considered valuable: one of gold's beauties is how it reflects the light. Gems are valued for how they catch the light, and the craftsmen develop their skill in how to catch the light. Some things are made beautiful simply by catching the light.
In appreciation of the value of things left unsaid, I'll stop there.