What is it that makes the difference from the Dull to the Shining is the Sun, and so it is with us.
We too are asleep in darkness. Our colors are Faded. The hues are blended together and we can't make out the Saint we are meant to be until the "Son" comes in.
Then we are a New Creation, a Story for those around us to see and Glorify not the colors or the Windows, but the Artist and Son.
"Giving thanks to the Father, who has qualified us to Share in the inheritance of the Saints in Light" Colossians 1:12