It is finished. We can entrust ourselves to Jesus, relying on His death to pay our debt, knowing that the promised king has accomplished His saving works.
Jesus stood like a priest between God and humanity and did everything necessary to bring the two back together. The best that we can do in response to all of this is worship Him.
We won't understand Christmas unless we realise that the birth of Jesus is the best news we have ever had, because Christ is the Saviour that we all need to save us from our sins.