The War Against Evil

Seventy “sevens” are decreed for your people and your holy city to finish transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the Most Holy Place. (Daniel 9:24)
The common understanding of Christian people is that: “sin can never enter Heaven. It is a holy place, and those who are privileged to enter Heaven automatically become righteous, holy, and obedient to God.
“No matter how casual we have been during our Christian life, once we die and go to Heaven we will become a disciple of Jesus, and filled with righteousness, love, joy, and peace.”
If this only were the case!
It may be difficult for us to realize that sin began in Heaven, and that Satan still is able to accuse the saints before God. The war against evil has not been won as yet. I would guess we are about halfway there.
For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. (Ephesians 6:12)
The atoning death of the Lord Jesus Christ on the cross of Calvary did not put an end to sin in God’s creation, as is obvious today. However, it has given us the legal authority to take back what Satan has stolen.
A great sign appeared in heaven: a woman clothed with the sun, with the moon under her feet and a crown of twelve stars on her head. She was pregnant and cried out in pain as she was about to give birth. Then another sign appeared in heaven: an enormous red dragon with seven heads and ten horns and seven crowns on its heads. (Revelation 12:1-3)
The struggle between good and evil is portrayed graphically by the woman clothed with the sun, representing righteousness, and the enormous red dragon.