How can we be sure our sins are forgiven?

Assurance of forgiveness is rooted in the character of God and the atoning work of Jesus Christ. As stated in Romans 4:8, blessed is the man to whom the Lord will not impute sin. This means that when God looks upon those who are in Christ, He sees them clothed in His righteousness rather than their sin. The promise of unconditional forgiveness was demonstrated by Christ in His interaction with the adulterous woman in John 8, where He said, 'Neither do I condemn you; go and sin no more.' This assurance that our past, present, and future sins are covered by His grace brings true peace and comfort to the believer.