Evergreen Trees were the symbol of eternal life. Martin Luther introduced them to the Reformation Church as a picture of our endless life in Christ, by bringing in a tree to his family on Christmas Eve lit with candles (Isaiah 60:13 ).
Candles are a picture that Christ is the Light of the world ( John 8 ).
Holly speaks of the thorns in His crown (Matthew 27:29 ).
Red is a color of Christmas that speaks of Christ’s blood and death.
Gifts are a reminder of the gifts of the Magi to baby Jesus. Each of them speak to a component of His incarnation: Majesty in life, Bitterest Agony in Death and He as God’s Perfect gift to us (Matthew 2 ).