How do we know that our sins are forgiven according to the Bible?

Our assurance of sins being forgiven is founded on the redemptive work of Christ. Psalm 32 emphasizes the blessedness of the man whose iniquity the Lord does not charge, highlighting that sin is lifted off and covered (Psalm 32:1-2). This doctrine is reinforced by New Testament scriptures, such as John the Baptist’s proclamation that Jesus is 'the Lamb of God who takes away the sin of the world' (John 1:29). Furthermore, Hebrews 1:3 refers to Christ having purged our sins, symbolizing that true forgiveness is based not on our merit but on the sacrificial blood of Christ.