The Advent wreath is a contribution of the German and Scandinavian traditions.  It developed out of the simple use of an evergreen spray of fir, spruce, balsam, or pine placed near the hearth.  The wreath is plain, without any ornamentation of ribbon or bow.  The evergreen of the wreath represents the life that is found in Christ.  The greens have come from the out-of-doors where nature has begun its winter sleep.  Midst the drabness of nature the evergreen branch symbolizes the continuation of life.  In the home it is placed on a central table.  In the church it is usually suspended above the altar or set on a pedestal resting on the floor.

The Advent candles are arranged with the spray.  Candles have been used for centuries as the symbol of light.  The light reminds us of Christ, the light of the world, so it is not at all strange that the Christian church has given the candle a prominent place in the observance of Advent.

It is the living light, the living flame, that gives the candle its meaning, for the gospel light of Christ is itself a living power.  This is what makes it more symbolic than artificial lights.

Jesus is the light that broke forth on the world on that first Christmas when he was born as Prince of Peace.  He is the light that gradually penetrated into all the world.  The traditional act of lighting one more candle each week–or each day–tells of the increasingly brighter light of his coming, and leads gradually to the blaze of light at the dawning of Christmas.
Here is a listing of prophecies to be read during the four Sundays of Advent:
 

1st Sunday in Advent – Jeremiah 33:14-16; Isaiah 9:1-2
Christ the Branch of Righteousness is promised.
The Prophecy Candle honors those who spoke His promises
 

2nd Sunday in Advent – Micah 4:1-7, 5:2
Christ will establish His Kingdom of Grace.
The Bethlehem Candle symbolizes the preparations made for Him.


3rd Sunday in Advent
– Malachi 3:1-6; Luke 2:20
Christ shall purify His people.
The Shepherds’ Candle honors the first to spread the good news.
 

4th Sunday in Advent – Isaiah 40:1-8; Luke 2:13-14
Christ shall comfort His people.
The Angels’ Candle celebrates the joy of God’s grace to mankind.