Luther's September Testament not only shaped the reformers’ theology but also was as big an influence on the German language as Shakespeare was for English.
Confession is not another ecclesiastical bludgeon but is instead a gift. There we can tell the truth about ourselves, knowing that Christ has only mercy for us in response.
Luther saw that God demands not that we become perfectly righteous like God but that we simply receive the gift of righteousness; a gift that actually makes us worthy.