God forgives sin. He knows that we are sinful and in need of a Savior and He offers salvation through Jesus Christ. See what he says in Psalm 103.
As far as the east is from the west, So far has He removed our transgressions from us.
Psalms 103:12 NASB
God then removes our sins from us. Just like east and west never meet again, so our sins are removed completely from us. We do not have to be enslaved by the memory of our sins, God has set us free!