Parshas Mishpatim: Creating a sacred polity is harder than creating a holy individual

The difference between קְדוֹשִׁים תִּהְיוּ vs. וְאַתֶּם תִּהְיוּ לִי מַמְלֶכֶת כֹּהֲנִים וְגוֹי קָדוֹשׁ