How can I know if my sins are forgiven?

The assurance of forgiveness lies in faith in the redemptive work of Jesus Christ. 1 John 1:9 promises that if we confess our sins, He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness. This assurance does not depend on our own efforts but on the faithful character of God and the sufficiency of Christ's sacrifice. When we genuinely repent and place our faith in Christ's atoning blood, we can rest assured that our sins are washed away, and we stand justified before a holy God. Thus, personal knowledge of forgiveness is deeply tied to faith in the Gospel.