This essay explores Foucault's conception of the historical a priori through the lens of an archival ethics of eros. Highlighting the paradoxical nature of the historical a priori as both constitutive and contingent, it harnesses the temporal dynamism of experiences of the untimely as erotic. Drawing on the work of Anne Carson, the essay brings out the strangeness of eros as an ancient Greek word that remains unintelligible to us. That strangeness signals an ethics of dissonant attunement to the untimeliness of the historical a priori. Such an ethics of eros names those experiences of connection and rupture that both bind and unbind us in relation to a biopolitical present that is radically unstable. Reading eros as strange thus ultimately allows us to find resources for an ethics of self-transformation in Foucault's reflections on the temporal instability that the historical a priori names.