The Advent Wreath contains a circle of evergreen branches with four candles at equal from each other. The circle shape expresses God's unending eternity. The evergreen symbolizes God's unchallengeableness.
On each Sunday of Advent an additional candle is lit, signifying the coming brightness of the One who said, I am the Light of the World." Three of the candles are Purple reflecting the color of the season which reminds us of longing expectations. The candle for the third week, however, is pink signifying rejoicing, since the theme for the third Sunday of Advent is "Gaudete" (REJOICE!)