1 John 3:8 (ESV)
Whoever makes a practice of sinning is of the devil, for the devil has been sinning from the beginning. The reason the Son of God appeared was to destroy the works of the devil.
Theologians tell a story to illustrate how Christ's triumph presently benefits our lives: Imagine a city under siege. The enemy that surrounds they city will not let anyone or anything leave. Supplies are running low, and the citizens are fearful. But in the dark of the night, a spy sneaks through the enemy lines. He has rushed to the city to tell the people that in another place the main enemy force has been defeated; the leaders have already surrendered. The people do not need to be afraid. It is only a matter of time until the besieging troops receive the news and lay down their weapons. Similarly, we may seem now to be surrounded by the forces of evil -- disease, injustice, oppression, death. But the enemy has actually been defeated at Calvary. Things are not the way they seem to be. It is only a matter of time until it becomes clear to all that the battle is really over.
Dear Lord, we thank You that the battle is over and that You have won. Help us to stand firm in the fact that You have defeated the evil one. In the Name of Jesus, Amen.