With the transformation of the anticipation of Advent into the gift of the coming of Christ, we are left to answer what we will do with the presence of God among us. How will we be changed? What will the "light for revelation to the Gentiles" reveal to us about what is in us? What I am going to do about it might even be a greater question.
I learned some time ago that my first response to what God reveals in me is to trust in the atoning death of Jesus. The faith I put in Jesus is both desperate and sure. Desperate because I truly realize that I have no other recourse, but sure because the promise is based on God's faithfulness to me, not my faithfulness to Him.
And yet . . . that is only a first response. Even with the certainty of Christ's atoning death, I still need to ask myself what I am going to do about that in me which necessitated Christ's death - even though the guilt and punishment has been fully removed. I was not saved to continue to sin, but to be freed to become like my Savior.
After all the wrapping paper has been thrown away, the Christmas tree taken down, and the ornaments packed away for another year, what will the legacy of this Christmas be? The gift of Christ was given by the Father that we might become gifts in Christ to the Father.