How do we know Christ's victory over sin and death is true?

The assurance of Christ's victory over sin and death rests on His declaration from the cross, 'It is finished.' This statement indicates that He has fully satisfied the demands of God's justice through His sacrificial death. In Isaiah 63, we see the imagery of a warrior returning from battle, stained with the blood of His enemies, proclaiming the defeat of sin and death. The resurrection of Christ further affirms this victory, signifying that He overcame the grave, secured our redemption, and offers us hope through the power of His blood. Thus, our faith is grounded in the historical and transformative events of Christ's life, death, and resurrection.