There's no better time than now to reflect on the true nature of Christ's birth...the following is an excerpt from "Waking the Dead" by John Eldredge...
Many people think the theme of war ends with the Old Testament. Not at all. Jesus says, "I did not come to bring peace, but a sword" (Matt. 10:34). In fact, his birth involved another battle in heaven (Rev. 12:1-5, 7-8, 17).
The birth of Christ was an act of war, an invasion. The Enemy knew it and tried to kill him as a babe (Matt. 2:13). The whole life of Christ is marked by battle and confrontation. He kicks out demons with a stern command. He rebukes a fever and it leaves Peter's mother-in-law. He rebukes a storm and it subsides. He confronts the Pharisees time and again to set God's people free from legalism. In a loud voice he wakes Lazarus from the dead. He descends to hell, wrestles the keys of hell and death from Satan, and leads a train of captives free (Eph. 4:8-9; Rev. 1:18). And when he returns, I might point out, Jesus will come mounted on a steed of war, with his robe dipped in blood, armed for battle (Rev. 19:11-15).
War is not just one among many themes in the Bible. It is the backdrop for the whole Story, the context for everything else. God is at war. He is trampling out the vineyards where the grapes of wrath are stored. And what is he fighting for? Our freedom and restoration. The glory of God is man fully alive. In the meantime, Paul says, arm yourselves, and the first piece of equipment he urges us to don is the belt of truth (Eph. 6:10-18). We arm ourselves by getting a good, solid grip on our situation, by getting some clarity on the battle over our lives. God's intentions toward us are life; those intentions are opposed. (Waking the Dead , 15-16)