If you wanted to spruce up your windows, you could paint the sills and casement, install blinds or shades, or hang new curtains. If money is no object, you could replace the old windows with new ones. Of course, you could just add some grilles, shutters, or a cute goat.
“Your eyes are windows into your body. If you open your eyes wide in wonder and belief, your body fills up with light. If you live squinty-eyed in greed and distrust, your body is a dank cellar.” –MATTHEW 6:21-23 (MSG)