Machiavelli insists that if liberty is to be preserved: no person and no magistrate may be permitted to be above the law; there must be legal means for any citizen to bring accusations against any other citizen or any official; terms of office must be short, and must never, no matter what the inconvenience, be lengthened; punishment must be firm and impartial; the ambitions of citizens must never be allowed to build up private power, but must be directed into public channels.