How do we know forgiveness is available in Christianity?

The assurance of forgiveness in Christianity rests upon the finished work of Jesus Christ. 1 John 1:7 declares, 'The blood of Jesus Christ, His Son, cleanses us from all sin.' This highlights the centrality of Christ’s sacrificial death as the basis for our forgiveness. God’s justice demands that sin be dealt with; therefore, Jesus bore our sins in His body on the cross, satisfying divine justice and enabling us to be forgiven. Thus, our hope of forgiveness is not grounded in our merit but solely in Christ’s sufficient atonement for our sins.