Most people think of Advent as a warm-up to Christmas, but actually, it's the other way around. Christmas is a preview of Advent! Christmas is the festival of rejoicing at Christ's first coming-the beautiful, unlikely start of our salvation! But each year, in the last week of December, the trees come down, the lights are unplugged, our nativity scenes are wrapped in newspaper, and our "Joy to the world" fades into silence until...