The individuals see the good they reject; the public wills the good it does not see. All stand equally in need of guidance. The former must be compelled to bring their wills into conformity with their reason; the latter must be taught to know what it wills. If that is done, public enlightenment leads to the union of understanding and will in the social body: the parts are made to work exactly together, and the whole is raised to its highest power. This makes a legislator necessary.