When they're gone, they 're gone. ( Romans 4 v 7 - 8 )

 Psalm 103 is one of contrast, we have in v 3 , we have Gods forgiveness ,He is the one who forgives all your sins. that is something we can't do, forgiving sins is Gods business, No priest can forgive sins, the only priest that can do is Jesus our great High  Priest Hebrews 10 v 17- 18. He forgives all our sins, no matter how many they are, no matter how bad they have been, no matter how far back in our lives they have taken place. All our sins can be forgiven ,let me stress this again , all our sins. The death of Christ was for sins we have committed (Christ never sinned ),the blood that He shed, cleanses us from all sin,1 John 1 v 7. Consider v 12 of this Psalm , 'As far as the east is from the west, so far has He removed our transgressions from us', they are gone, vanished, we are free from guilt, no longer under the wrath of God.

                                                  My sin, O the bliss of this glorious thought!

                                                 My sin , not in part but the whole,

                                                 Is nailed to His cross, and I bear it no more;

                                                 Praise the Lord, praise the Lord, O  my soul.  ( Words H. G. Spafford)