"That's what happened on Easter morning. Jesus' sacrificial death and resurrection on our behalf was the beginning of the end for Satan, because it destroyed his foothold in the contested territory of our hearts. Every human being who turns in repentant faith to Christ the Rescuer dies with Christ to his sins, and is raised in Christ to a new kind of life. Of course this new life takes root only gradually, but as Lewis explained, the entry of Christ into a human heart is like the landing of the Marines on the strategic part of an enemy-occupied island. Once the Marines establish their beachhead, the expulsion of the enemy from the rest of the island is only a matter of time. "