Question: “How should a Christian deal with feelings of guilt regarding past sins, whether pre- or post-salvation?”
Answer: Everyone has sinned, and one of the results of sin is guilt. We can be thankful for guilty feelings because they drive us to seek forgiveness. The moment a person turns from sin to Jesus Christ in faith, his sin is forgiven. Repentance is part of the faith that leads to salvation (Matthew 3:2; 4:17; Acts 3:19).