Early in his career Mishkin saw that the law could be apprehended from two distinct and in part incompatible perspectives: from the internal perspective of a faithful practitioner and from the external perspective of the general public. If the social legitimacy of the law as a public institution resides in the latter, the legal legitimacy of the law as a principled unfolding of professional reason inheres in the former. Mishkin came to believe that although the law required both forms of legitimacy, there was nevertheless serious tension between them, and he dedicated his scholarly career to attempting to theorize this persistent but necessary tension, which he conceived almost as a form of antinomy. In this article we pay tribute to Mis...