The Advent wreath, four candles on a wreath of evergreen, is shaped in a perfect circle to symbolize the eternity of God. In some churches, four purple candles, one for each week in Advent, are used with one larger white candle in the middle as the Christ candle.
During each Sunday of the Advent season, we focus on one of the four virtues Jesus brings us: Hope, Love, Joy and Peace. The Christ candle is lit on Christmas Eve or Christmas Day reminding Christians that Jesus is the light of the world. The order and exact wording vary among churches, but the wreath continually reminds us of whom we are called to be as followers of Jesus.