In this contribution we will try to illustrate the Heideggerian process and, therefore, its hermeneutic movement, and above all to highlight its possible limits. In his commentary on Plato’s Sophist, Heidegger states that, in order to understand the most authentic core of an author’s thought, it is necessary to start precisely from what he does not say. Heidegger identified Aristotle as the philosopher capable of clarifying Plato’s “darkµ thought; in this way he ended up over-interpreting it by applying Aristotelian categories to it.