All the talk of sin might seem heavy, but it all leads to Paul’s point: we have righteousness through faith in Jesus. This righteousness and forgiveness is available to all who believe in it. As all have sinned and fallen short, all are justified by grace.
As our righteousness is through faith alone and not by our own efforts, we cannot claim that we are more righteous or godly than anyone else. God justifies all people through faith alone. This justification is a free gift of grace to all who have faith in Jesus, one which we are to praise and thank God for each day.