How do we know that Christ's sacrifice removes sin and curse?

The assurance that Christ's sacrifice removes sin and curse is deeply embedded in the fulfillment of Old Testament prophecy and the teachings of the New Testament. Specifically, 2 Corinthians 5:21 states that God made Christ, who knew no sin, to be sin for us. This indicates that Christ took upon himself the full weight of our transgressions and consequences, representing both sin and curse in his body on the cross. His identification with humanity’s sinful state is exemplified in his crucifixion alongside thieves, as recorded in Mark 15:28, fulfilling Isaiah 53:12. In doing so, he bore God's wrath against sin, offering a perfect and complete atonement, so that those who believe in him may be justified and receive the righteousness of God—a foundational truth of the Gospel.