FELIPE SEELAENDER COSTA ROSA

We intend to investigate the way Heidegger elaborates the question of nothingness in three moments of his thought. The first concerns the proposal of the existential analysis of Being and Time , from 1927, in which the question of nothingness arises based on the question of anguish and the elaboration of the question of being through the analytics of Dasein, influenced by phenomenology. The second refers to the lecture What is metaphysics? , from 1929, which belongs to this moment in Heideggerian thought in which the questions raised in Being and Time are elaborated differently and face a series of difficulties and challenges, which open new horizons for thought. The third concerns Heidegger's approach to the question of nothingness in the first part of the 1935 summer semester lecture, Introduction to Metaphysics . At this moment, the reflection on nothingness arises from a deeper questioning of language and the history of Being, which brings it closer to poetry: the question of Being is elaborated more forcefully as a joint effort of thought and language, no longer limited to the register of the analytics of Dasein and the question of anguish. In it, the thematisation of nothingness approaches the question of holiness and poetry in the constitution of what Heidegger considers to be the task of thinking. To this end, we will analyse texts from the same period, such as On the essence of foundation (1929) and On the essence of truth (1930) and, in addition, we will have as a secondary reference other texts of Heidegger, such as The fundamental problems of phenomenology (1927), What is this-philosophy? (1935) and The epoch of the world image (1938), as well as texts written later that bring a retrospective look of Heidegger on the addressed subject, such as Afterword to 'What is metaphysics? ' (1943) and My path in phenomenology (1963). Based on this effort aided by the work of commentators such as, among others, Hans-Georg Gadamer, Benedito Nunes and Friedrich-Wilhelm von Herrmann, we hope to understand how the difference in the way Heidegger elaborates the question reflects the numerous problems that arose after Being and Time , as well as the more direct intertwining of the hermeneutic problematic with the dimension of history and language. The main objective of the research is to understand the meaning behind these moments and the course of Heidegger's thought between them.