The devil has blood on his hands

The blood of Jesus Christ is documentation of Jesus' death for us which frees us from all obligation to the devil, erases all guilt, and pays all penalties. We have been made just or we have been justified. United with Christ we have been restored to the original position of sons of God. With Christ we have authority over the devil.
The devil knows all of this. He is fully aware of the significance of Christ's blood. He is responsible for it. He killed an innocent man. The blood is on his hands figuratively speaking. Satan was defeated by his own hand. Through Christ's death we have been all made alive in Christ. This all adds up to a great victory for those in Christ; abundant life for all who are in Christ.
This victory must be enforced. You'd think that after such a decisive victory by Jesus Christ that the devil would just concede and quit his activities. This victory must be enforced over and over again. The pressure is constantly on us to give up our resistance to unrighteousness and just revert to the old life of bondage to the world, the flesh and the devil.
When a great victory has been won, celebration is in order, like winning the super bowl or the world series. It is the most normal thing to do. We don't celebrate what we have done though but rather what Christ has done.
We need to understand the significance of the blood of Christ. It is this knowledge that enables us to enjoy the victory in Jesus. If this knowledge is cloudy or not there, all we have left are our feelings, and they change with the circumstances.
In John's Revelation chapter 12 we see a group of God's people living in the worst possible circumstances. The anti-christ rules the world, all freedoms are gone, Christians are a forbidden people. In all this God's people survived, no rather, they overcame, they were more than conquerors. They overcame the anti-christ, the devil, the world, their own human-ness and the terrible circumstances "by the blood of the Lamb and the word of their testimony".