How do we know that Christ is victorious over sin?

The victory of Christ over sin is foundational to sovereign grace theology, underscored by His sacrificial death and resurrection. Revelation 12:11 states that believers 'overcame him by the blood of the Lamb,' indicating that Christ's atonement is the basis for overcoming sin and Satan. This profound truth reflects God's redemptive plan established before the foundation of the world, affirmed through the prophetic narratives in the Old Testament, culminating in the New Testament revelation of Christ. The reality of this victory brings assurance to believers, emphasizing that their salvation is secured in Christ's accomplished work, where He disarmed the principalities, offering them life and victory over sin.