Abstract
If it is possible, according to Heidegger, to find ontology as the core of transcendental-reflective philosophy, this paper argues, paying special attention to the course of lectures "Was heißt Denken?", that the reflective model is also present in Heidegger's "memorial thought." Comparing then some main features of memorial thought and idealistic reflection, it tries to determinate briefly the meaning of reflection as laid down by philosophers as Kant and Fichte, and to find its role in Heidegger's thought. Main conclusion is that a thought which undertakes to understand itself and its dialogue with others cannot dispense with a reflective moment.