How does the gospel bring rest to believers?

The Gospel of Jesus Christ brings true rest to the soul by affirming that salvation is entirely the work of God. It reassures believers that all requirements for righteousness have been fulfilled in Christ, who perfectly obeyed the law on their behalf. In the sermon, it is noted that 'the law of the Lord is perfect, converting the soul.' This means that while the law reveals sin and incapacity to attain righteousness, the Gospel announces the completed work of Christ, bringing peace to those who believe. The assurance of being justified by faith and the ongoing application of the Gospel by the Holy Spirit allow believers to find rest from their struggles to attain righteousness through their own efforts and to embrace the sufficiency of Christ's sacrifice.