This study maintains that Borges's treatment of philosophy is not ironical or literarily reductionist with respect to one of its sub-disciplines: Ethics. In order to substantiate this thesis, Borges's relation to Nietzsche from the 1930s to the 1950s is explored. The most important aspect of this relation, as will be seen in this study, is Borges's serious reading of Nietzsche's ethics, which can be contrasted to his playful, ironic and at times derisive attitude toward Nietzsche's metaphysics and writing style. The significance of such a reading for this study is that it runs parallel to and overlaps with Borges's repeated skirmishes with anti-Semites, fascists and other nationalists in both his fictions and non-fictions. It is in this context that his engagement with ethics can be appreciated.