As it is written in Isaiah the prophet,
"Behold, I send my messenger before they face,
who shall prepare the way;
the voice of one crying in the wilderness:
Prepare the way of the Lord,
make his paths straight--"
These weeks of Advent are important while we prepare symbolically for the appearing of Jesus. As we deck our walls, trim our trees, sing carols, buy gifts, and all the other things the Christmas season brings, we prepare our hearts and minds for the coming of the Christ.
Each small thing reminds us of the greatness of God, coming to earth as a little child, in order that we might know him personally.