Commenting on some Heraclitean fragments, Heidegger examines the meaning of Being as λόγος, affirming the possibility to have access to it through an authentic hearkening. The most interesting aspect about this analysis is that it is outlined a tight ontological dependence — a sort of belonging that comes to be translated as obedience — of the human being with respect to Being. However, the German philosopher doesn’t explicitly provide for human agency. This paper aims to give an account of the reading on Heraclitus that Heidegger presents in the ‘40s and ’50, underlying its critical elements in terms of their implications.