What does it mean that the warfare for God's people is accomplished?

In Isaiah 40:2, the declaration that 'her warfare is accomplished' signifies the completeness of Christ's victory over sin, self, Satan, and death. This victory implies that believers, through faith in Christ's atoning sacrifice, are no longer under condemnation but have been delivered from the powers that once held them captive. The battle for their souls is won, and they can now rest in the assurance of peace and eternal security. This understanding fuels their hope and encourages steadfastness amidst trials, as they are reminded that they are victors in Christ.