How do we know that Christ's sacrifice forgives our sins?

The doctrine of forgiveness hinges upon the redemptive work of Jesus Christ. Christ's sacrifice is the fulfillment of God's justice, which requires payment for sin. As stated in the sermon, 'If my sins were put away by Christ on the cross, God is faithful and just to forgive me of those sins.' Forgiveness follows because Christ has already accomplished the work of redemption (Revelation 5:9). This means our sins, both past and future, are entirely covered by the blood of Jesus, ensuring that for the believer, there is 'no condemnation' (Romans 8:1). Hence, the forgiveness extended through Christ's sacrifice is not just conceptual but is based on an actual, completed work that guarantees the salvation of His people.