Municipal law, to be satisfactory, should be a body of abstract principles capable of being applied impartially to all relevant facts, just as Marshall and Jay held it to be. Where exceptions begin, equality before the law ends, as I have tried to show by the story of King David and Uriah, and therefore the great effort of civilization has been to remove judges from the possibility of being subjected to a temptation, or to a pressure, which may deflect them from impartiality as between suitors.