This paper is going to explore an unorthodox understanding of "authenticity." In its unorthodoxy, it may just, then, be more authentic, and more true, than the conventional understandings of this word, and less subject to attack than those conventional understandings. The author proposes here that the most authentic form of authenticity for human beings is relational and transcendental, not in any way simply personal and existential, as it is for the tradition extending from Kierkegaard through Heidegger and Sartre, at least as they are commonly read. This notion of authenticity--surprisingly, considering how thoroughly modern the concept of authenticity is most often apprised to be--can be traced back to Socrates and Plato.