When forgiven, your sins are no longer in God s mind. They are rendered to oblivion. This means that God does not meditate on your sins. We brood over wrongs done to us. We nurse them.
Indignation turns to fury which becomes the desire to retaliate.
He does not upbraid us for our sins. He does not drag them up to remind us. No one can call them to His attention. Sometimes we forget a wrong done to us only to have it brought up by another and it suddenly revives with all of its pain. God cannot be reminded of our sins which He erases and forgets.